User blog comment:MrGamer21/10 Things Wrong With Just Dance 1/@comment-8846246-20150513035210/@comment-5392675-20150513113233

I think the deal with Gaga was that, at that point, she was hooked up to Dance Central. Only during the period of JD2014 did her DC contract end, which allowed her to join JD.

Also, Tiddles, I think that at that point in time, Ubisoft hadn't struck a deal with them, so they weren't there yet. Remember, they were in the immediate sequel.