Bad Romance

"Bad Romance" by Lady Gaga is featured on Just Dance 2015, Just Dance 2015 China and Just Dance Now.

P2

 * Legless jumpsuit and wedding veil.
 * Straight hair & flower headband (during the chorus).
 * Puffy hi-low dress (also during the chorus).
 * Purple fingerless glove.
 * Monster claws.
 * Purple outline.

Backup Dancers

 * Legless jumpsuits.
 * Chignons and wedding veils.
 * Monster claws, like the lead dancer.
 * Both have red fingerless gloves.
 * Both have a red outline.

Official Choreo
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 * Black short hair.
 * Pink eye shield.
 * Teal one-sleeved cropped shirt that's highly cut on the left.
 * Pink crop top.
 * Black shorts.
 * Pink and blue striped socks.
 * Black boots.
 * Royal blue fingerless glove.

Classic
White random connected lines appear, and for the pre and after chorus parts of the background are completely pitch black. At the end of the song, it is made clear that the dancers' wedding gowns touched the ground and turned into a pile of lace.

Official Choreo
It uses the Extreme background from the previous game. The colours that flash are red, violet, and teal.

Mashup
Bad Romance has a Mashup with the theme Monsters. It consists of monsters/spooky dancers and can only be unlocked in October. The mashup is likely named this because Lady Gaga's fans are called "Little Monsters".

[GM#] - Where a gold move occurs.

* - The dancers are not monsters.

 (parentheses) Indicates the type of monster the dancer is dressed as.

Dancers
(No repeats)
 * I Will Survive (Zombie) [GM1]
 * Sympathy For The Devil (Devil or Demon) [GM4&5]
 * Born To Be Wild (Werewolf)
 * Funkytown (Alien)*
 * Applause (Alternate) (Show Dancer)*
 * Maneater (Succubus)
 * Funhouse (Clown)*
 * Monster Mash (Frankenstein's Monster) [GM2] [GM3]

Classic
The Classic version of Bad Romance has a Community Remix.

The following are featured:
 * Luffy Sama Br
 * JoeMario37
 * SAID SOCRAM
 * Afroditi22
 * Beto Ordaz
 * morales360bkn
 * Amandamoonmu
 * babuxa
 * Misa Yorke
 * XxGenesisMCxX
 * ViviLeerhsen
 * twilightfire73
 * OliveStatue768
 * TristanStern17
 * TangerineLime7
 * Infinityccv
 * LINMX
 * Guerrerodesampa

Official Choreography
The Official Choreography also has a Community Remix only featuring the finalists from the Just Dance World Cup. Thus, it is the first 'themed' Community Remix in the series.

The following are featured:
 * Dih_San
 * Tulioakar96
 * TheFairyDina
 * Moogly-H
 * Stef
 * Littlesiha
 * Keikodancer
 * Roxsora13Xx
 * RenoTonakai
 * dim0n19
 * nounet racein2ix
 * Kelvin Jaeder

Classic
There are three Gold Moves in the Classic routine, all of which are the same.

Lead Dancer
All: At the chorus, bring your arms downward and upward. (Kissing style)

Backup Dancers
All: At the same time as the lead dancer, put your forearms on top of your arms. (Folding style)

Official Choreography
There are three Gold Moves in the Official Choreography: Gold Moves 1 & 2: When the chorus begins, bring your arms downward and give your legs a slight shake while kneeling. Gold Move 3: When the third chorus begins, quickly bring your arms upward and give them a strike.

Mashup
There are 5 Gold Moves in the Mashup: Gold Move 1: Put your hands down at the screen. (I Will Survive) This is the second move for the routine. Gold Moves 2 and 3: Shake your arms back and forth. (Monster Mash) Gold Move 4: Swivel down. (Sympathy For The Devil) Gold Move 5: Get up and put your hands to the air slowly. (Sympathy For The Devil)

Trivia

 * This is heavily considered to have some "ghoulish" features.
 * Just Dance always has a Halloween themed dance because the game comes out in October. This and Black Widow are most likely the Halloween songs for Just Dance 2015.
 * It is the second Lady Gaga song to have this Halloween theme, after Applause.
 * The words stick and b***h are censored, the former referring to a man's reproductive organs, and the latter simply being too explicit.
 * This is the first Lady Gaga song with censored words.
 * Despite being removed, they can still be slightly heard.
 * This is the third Lady Gaga song in the series, with the first two being Just Dance and Applause on Just Dance 2014, and the fourth being Born This Way, on Just Dance 2016
 * This routine resembles that of Black Widow, because of the veil in some parts and the floating web in the chorus.
 * This is the first time that the dancers are completely white, as well as hardly visible.
 * This is also the first time the coaches' skin color isn't tan/yellow like in Hot N Cold because they're wearing white clothes. In fact, if you look closely, their skin is pointed to a more flesh colour; it can be seen well in an HD photo.
 * This is the second song after Hot N Cold in which its dancer(s) are wearing wedding gowns.
 * This is the first time a dancer changes her real-neon contrast to real. It always happens in Just Dance Kids series, but it has never happened in the main series.
 * If anyone would be able to see the lead dancer's face clearly, they would assume that she might be the same dancer as P4 from Tetris.
 * It was confirmed in the final Just Dance World Cup that Mehdi Kerkouche is the dancer of the official choreography.
 * Both routines (especially the Extreme) use some of the official choreography for the song with slight changes for the choreography when the chorus is sung.
 * Both modes have similar moves due to them following the original choreography.
 * This is the second song, in the main series, that has the official choreography after Applause in Just Dance 2014.
 * This is also the second song by Lady Gaga that has the official choreography.
 * The lead dancer does not keep in rhythm with the background dancers during the twists.
 * This is the oldest 21st century song in Just Dance 2015, coming from 2009.
 * Barring DLC, it's the only 00's song in the game.
 * The backup dancers highly resemble Maddie Ziegler in the music video for Chandelier by Sia when the verses are sung.
 * Since Oh No! has non playable backup dancers, this is the official first ever all female Trio dance mode in the whole series, not counting the On-Stage version of Just Dance.
 * The game uses the longer version, which is 4:54, rather than the shorter version like Ubisoft usually would use.
 * This is one of the longest songs in the main series.
 * It beats I Don't Feel Like Dancing as the longest song in the main series.
 * The Mashup includes some dancers which are not monsters. They are Maneater (she could be a demon, succubus or vampire), Funhouse (she's a clown; however, clowns are known to scare people), Funkytown (aliens are technically not monsters, but its appearance may make people think the coach is indeed a monster), Applause's alternate mode (she could be a clown, mime or show dancer).
 * The Mashup features quite possibly the quickest appearance of a Gold move in relation to the beginning of the song and move number. The first gold move appears as the 2nd move (during I Will Survive) in the entire choreography.
 * The Bad Romance Mashup tied with the Just Dance 2 DLC song Chicken Payback and S.O.S for the earliest appearance of a gold move, the first one in the entire choreography appears as the second pictogram. However, the one for Bad Romance's Mashup appears earlier.
 * The song has three French lines, two different ones. They're "J'veux ton amour" (I want your love) and "Et je veux ta revanche" (And I want your revenge).
 * In a trailer revealing some unknown routines, which says "Adding new flavors to the mix," one of the dancers is seen with the same elements as that in the classic mode for this track. He was a black silhouette and was under dark blue sheets, just like the backup dancers for the classic mode.
 * The official choreography uses a move from When I Grow Up (3rd Contest Winner Choreography). In this case it's very possible the contest winner used a move from the music video, so Bad Romance's alternate mode didn't exactly recycle the move.
 * The official choreography is claimed by Ubisoft to be the hardest choreography ever in the series when it is unlocked.
 * The dancer in the official choreography can be seen lip syncing the line Rah rah ah ah ah, roma-roma-ah, Gaga, ooh-la-la, want your bad romance. He only lip syncs a few of these repeated lines.
 * Tulioakar96, a famous YouTuber who uploads Just Dance gameplays, is seen in the Community Remix.
 * In Just Dance Now, the song is placed in the Solos section.
 * This is probably because there isn't a Trios section yet in Just Dance Now.