I extracted the menu squares from the Just Dance 2016 Wii U files, along with the squares for the Just Dance Unlimited songs that were released from October 2015 to April 2016.
Please help out by adding the squares to the articles of the Just Dance 2016 content, and replace the files from Just Dance Now! If I attempt to do this by myself, it would take a long while. You can find the images here.
NOTE: I have not uploaded all of the images yet, so please wait for me to add more content to the blog.