Just Dance 2/Beta Elements

Graphics and Scoring

 * Scores had different effects.
 * The Gold Move effect was different.
 * The Gold Move feedback effect was different, too. In some videos, the yellow X was replaced by the red X. However, the yellow X was used in the final version.
 * The "YEAH!" feedback icon was also designed differently.
 * The effect that removes the "On Fire!" on the score tracker was different, too: it had a blink at the end of the On Fire phase, which has been removed.
 * The "cloud" (the graphic that contains the player's score and name) was smaller.
 * The Sweat gauge was different: it was circular and grey with a sweat drop, instead of cloudy and blue.
 * The scoring seemed to be the same as in ; one could reach up to 20000+ points. In the final game, it would be 10 stars.
 * The pictograms were meant to look like those in, as proven in the files of Soul Bossa Nova and The Power.
 * The Just Sweat meter had a yellow color palette instead of a light blue one.
 * The OK feedback icon was red instead of purple, as seen in the teaser for Moving on Up.

Songs and Routines
In Just Dance 2, there are a lot of known content that was unused or changed. Most of these elements are known because of videos like the official trailer video as seen below and individual trailers for songs that have been featured in the game.

A-Punk

 * In the trailer of Just Dance 2 when P1 from A-Punk was seen alone (to make the new Duet feature a surprise) his suit was orange but was later seen again with P1 in the final cut with the regular color scheme.
 * In the trailer, P1 was going to be P2.
 * The choreography had a different intro: the coaches weren't frozen, and they looked at each other before starting.

Alright

 * In the menu icon, the tiles on the keyboard are white instead of red-pink.

American Boy

 * In the Just Dance Now files, there are several beta pictograms for both coaches.

Baby Girl

 * Baby Girl has a beta pictogram.

Barbie Girl

 * The pictograms were both magenta, as shown in a photo. These particular pictograms do not represent any moves preformed in the actual routine, which makes it likely that the choreography was different at some point in development.

Big Girl (You Are Beautiful)

 * Big Girl (You Are Beautiful) had a different hairstyle and some minor changes on the color scheme. A silhouette of this Beta version can be seen in the Medley menu icon.
 * Some beta pictograms are seen in Just Dance Now files. One is a placeholder.

Born To Be Wild

 * The fur for the werewolf costume that the dancer is wearing was originally going to be purple. This can be seen in the menu square and in some screenshots. However, the fur is blue in the actual gameplay.

Call Me

 * Call Me has two beta pictograms.
 * The coach appears on the NTSC cover of the game with a different color scheme (purple instead of green).

Crazy Christmas

 * The Beta version had a background in a shade of light blue instead of a shade of red.
 * A Beta pictogram can be found in the Just Dance Now files.

Crazy in Love

 * Based on an early screenshot, Crazy in Love’s coach had a different color scheme, didn’t wear glasses, and had longer hair.
 * 5 beta pictograms (including one beta pictogram which was supposed to not be a Gold Move) can be seen in the Just Dance Now files.

Cosmic Girl

 * The Just Dance Now files contain several unused pictograms that are yellow instead of pink, some of them are surrounded by a white space.

Crying Blood

 * The beta gameplay displayed "INVALID TEXT" on both folders for the red line that is supposed to display the song title and artist at the beginning.
 * The routine was supposed to have 8 Gold Moves instead of 4. This beta element was used in the remake.
 * A beta pictogram appears in the Just Dance Now files.

D.A.N.C.E.

 * D.A.N.C.E. has 1 Beta pictogram.
 * The Gold Move was supposed to be counted based on all moves during the line "Do the DANCE.", meaning that the players first had to open their arms and then put them up, and not just put them up.

Dagomba

 * The coach's skin colour was a bit more greenish.
 * The song was going to be called Electro Tribal. Despite it being changed, ElectroTribalDLC is still used as code name for Just Dance Now files.

Down By The Riverside

 * Down By The Riverside has a Beta pictogram that appears in the  files. It is light blue instead of ultramarine blue.
 * Two other Beta pictograms, which are recolored, can be found as well.
 * In the preview gameplay, the artists are credited as "Extreme Music".

Futebol Crazy

 * The coach's color scheme was light blue and purple instead of green and yellow, as shown in a preview gameplay.
 * When playing on the Xbox 360, this version of the dancer appears in Are You Gonna Go My Way’s Sweat Mashup.
 * An unused pictogram can be seen in the Just Dance Now files.
 * The "1" on the back of the coach's jersey was initially reversed; this mistake was fixed in the final version.
 * However, the "1" is reversed again in the Just Dance Now remake.

Girlfriend

 * P1 had a different color scheme.
 * She still appears with that color scheme in the menu icon, where P2 has a different color scheme as well. The dancers have also switched places.

Hey Ya

 * In the Just Dance Now files, there are two unfinished pictograms with their arrows drawn roughly.

Holiday

 * The dancer for Holiday had a different color scheme (which can be seen on the back of the game's cover) and the pictograms were pink instead of orange.
 * In a promotional picture that showed the Just Sweat mode, "Let's Sweat!" was part of the background.
 * A placeholder pictogram can be seen in the Just Dance Now files.

Hot Stuff

 * Hot Stuff had a lot of changes to the final cut.
 * The choreography was different, displaying the male as P1 and the female as P2 and having several changes in the dance moves.
 * The dancers' color schemes were different (it can be seen also in the back of the cover) as well as both dancers' pictograms as they were magenta.
 * In the Promiscuous Mash-Up in Just Dance 3 the used dance-recording in Just Dance 2 is featured but the color schemes and pictograms have been inverted, Purple is Yellow, Yellow is Purple.

I Got You (I Feel Good)

 * Based on the Just Dance 2 (James Brown) trailer, the color scheme of I Got You (I Feel Good) was different than the final released one.
 * In the E3 version of the game, the coach did not disappear from the screen after the end of the song, and there were marginal differences in the lyrics (for example, "My love won't do you no harm" was displayed fully instead of being split into two lines).

I Want You Back

 * I Want You Back has an unused Gold Move that can be found in the files.
 * A pictogram in the files has ochre props instead of light blue props.
 * The files include beta pictograms for the remake with default colors.

Idealistic

 * Idealistic had different color pictograms and different bars before. As was the case with TiK ToK, a higher scoring can be shown in an official video. This suggests that all songs were like this at one point.
 * The Gold Moves weren't even counted as a move, as seen in a preview.

Iko Iko

 * Iko Iko has an unfinished pictogram. The unfinished one appears in The Fox (What Does The Fox Say?), Never Can Say Goodbye and Dark Horses' Mashups and in the version of the song.

Jai Ho! (You Are My Destiny)

 * Two Beta pictograms are included in the files.

Jungle Boogie

 * A Beta pictogram is seen in the files.

Jump

 * The dancers' positions were flipped.
 * In another Beta picture, Gold Moves 1 and 3 are seen consecutively and not counted as Gold Moves.

Jump in the Line

 * In the menu icon, the coaches appear to have faintly different color schemes, showing the dark blue parts changed to green.

Kung Fu Fighting

 * There are several Beta pictograms in the Just Dance Now files. The first one, however, is used in Just Dance: Greatest Hits.

Monster Mash

 * Monster Mash has a beta pictogram.

Move Your Feet

 * Based on an early teaser, the dance originally had "Everybody" and "Move your feet" popping up every time they were sung. Also, the lyrics said "Got the dance energy" instead of "We're going down town".
 * The pictograms sprite contains three unused pictograms, and the preview video contains one too.

Moving on Up

 * In the trailer, the pictograms are red instead of purple, and the OK icon is red instead of purple.
 * In another screenshot, it can be seen that the background initially lacked the dancing audience and the four women behind the coach.

Mugsy Baloney

 * Mugsy Baloney has some beta single pictograms, found in Just Dance Now files.

Nine In The Afternoon

 * The beta version of this song features the dancers standing in reversed positions (male as P1 and female as P2) and a much brighter sun.

Pon de Replay

 * The coach's skin was initially meant to be white, but it has been changed to black. In another screenshot, she has black skin but the pictograms are darker blue. The white skin version appears on the back of the cover. There are also errors in the pictograms.
 * A Beta pictogram can be seen in the files.
 * In the trailer, the line "All de gyal pon de dancefloor" was written correctly; in the final release, however, it is misspelled as "All the gals on the dancefloor".

Professor Pumplestickle

 * The coaches had slightly different color schemes.
 * In another picture, both pictograms had the same color.
 * They were originally going to dance in Maniac's background.

Proud Mary

 * This song has a Beta pictogram.
 * In a beta picture for this song, one of the pictograms looks slightly different, with the arrow head on only one side.

Pump Up The Volume

 * A beta pictogram is in the files.

Rasputin

 * Rasputin has a Beta pictogram.
 * The coach was going to have different colored boots (green instead of black-green.

Rockafeller Skank

 * The routine has three unused pictograms. Including one that wasn’t supposed to be a gold move.
 * According to a promotional gameplay picture, the background initially had brighter lights.

Satisfaction (Isak Original Extended)

 * On the menu icon, the coach's color scheme is more green-gray than blue-purple, and the button on his chest is yellow instead of green.
 * Eight Beta pictograms can be found in the files.

S.O.S

 * In the beta version of S.O.S., the pictograms were purple instead of lime green and some were incorrect (there were also pictograms replaced with white squares).
 * Also, the part during "La la la la la la la la la oh" does not give points and as a consequence, there are no Gold Moves.
 * Also, the coach was originally going to have a flashing, fiery glow around her.
 * In the preview, "You got me stressin'"/"Incessantly pressing"/"The issue" was spelled as "You got me stressin',"/"incessantly"/"pressing the issue".

Soul Bossa Nova

 * The dance had incorrect I Want You Back pictograms, a slightly more animated background and different colour schemes for the coaches.
 * Also, the video features a completely different scoring design, featuring a "GREAT" scoring and no Gold Moves (like in ).
 * Some 3D-like pictograms that resemble pictograms can be found in the  files, along with three non-transparent pictograms.
 * Besides, some pictograms for P2 are ochre yellow instead of orange.
 * In the menu icon, the background has four fuchsia spotlights, which are not seen in the final routine.

Take Me Out

 * The Beta background for Take Me Out was much lighter in colour and featured differently coloured umbrellas; it also lacked the kites and the crabs.
 * The coach's outfit was different as well, as it was pointed to a red tone and the green parts were more saturated.

That’s Not My Name

 * The dancer was originally going to wear a hot pink mask, yellow lipstick and a red undershirt. This can be seen in the menu icon.
 * The amount of Gold Moves was likely going to be 3 instead of 6, as a Beta pictogram in the Just Dance Now files shows.

The Power

 * The pictograms were blue instead of purple and they were in 3D style like Soul Bossa Nova. Also there wasn't any special effect when the singer says "I've got the power."
 * Plus, an unfinished pictogram is in the Just Dance Now files.

The Shoop Shoop Song (It's in His Kiss)

 * This routine has some unused pictograms.

TiK ToK

 * In an early version of TiK ToK, the scoring system was totally different than from the final game. The video shows that with a score of 20000+, 5 stars would be achieved (instead of 10000 like in later games). In the Just Dance 2 logo, (above the gameplay) you can see more moves of the unused "Let's Get It Started" choreography. Also, "1,2,3,4" appeared on the pictogram bar before starting the song, like in Just Dance.
 * Also, the pictograms were different and Gold Move 2 was not counted as a Gold Move for this song.

Toxic

 * The Beta version of Toxic features different shaped doors, and in the beginning, they open until Britney starts to sing; this intro was changed for unknown reasons. In Just Dance Wii, these Beta elements are used.
 * 2 beta pictograms are found in Just Dance Now files.
 * On the menu icon, the big hazard sign has two little hazard signs inside of it, even though they are not present in-game.

Walk Like an Egyptian

 * Walk Like an Egyptian had a completely different choreography with unseen dance moves.

When I Grow Up

 * Based on an early screenshot, When I Grow Up had a different choreography (not including the contest winners) and a totally different color scheme.
 * The Beta color scheme also appears in the menu icon and the preview gameplay, which also shows Beta pictograms similar to those in the previous game.

Unknown Dancers
None of the dancers listed above (except for Let's Get It Started) were officially revealed for those songs, nor do they have other sources indicating that they're dancers and choreographies for other songs. They could possibly be beta dancers and early choreographies for other songs in the game or they could've been completely scrapped.
 * A female wearing an outfit similar at a cross between the Extreme version of Run the Show and Hit The Lights. Some have unofficially dubbed her for the song Turn Me On by Kevin Lyttle. The song was however suspected to be I Gotta Feeling by the Black Eyes Peas due to resemblances of a Live Performance of the song; however, the song was later featured in Just Dance 2016 with a completely different dancer and choreography. The dancer appears in a lot of the advertising of Just Dance 2. It was even on the cover of the game in the PAL-regions.
 * A male wearing a checkered top and green pants with straps. The dancer was rumored to be Let's Get It Started, another Black Eyed Peas-song (featuring will.i.am), due to his outfit that resembles will.i.am's in this song's music video. The dancer appears in a lot of the advertising of Just Dance 2 as well, even on the cover of the game in the PAL-regions along with the dancer above. Based on a photo, this dancer was supposed to be in the background of Baby Girl, and, If you look at it closely, you can see the game was in very early development (due to the animation of "Perfect" and "Good" being very different in the final game and only 2 names appeared when there were 4 players).
 * Some moves of this routine appear in animations near the big screens of E3 2010.
 * A complete extraction of the routine was found in the Just Dance 3 files, under the name "Letgetretarted 640x480", confirming that this coach was indeed meant for Let's Get It Started.
 * A female with a big pink and green dress, a blue mask and blue shoes is currently unknown. The song was unofficially dubbed for Poker Face by Lady Gaga because the costume is like Lady Gaga's black costume at the start of her "Poker Face" video and the "Poker Face" CD cover.