Despite all the fancy costumes and whatnot the video ended up looking really cheap and amateurishly put together, probably because there is no cohesion or storyline whatsoever. It's like she made a good fan version of a Lady Gaga video.
Has she commented on the copying at all? I even saw some MTV article calling it a "tribute" to all these videos (probably damage control by her publicist), but I really doubt Christina intended it that way. She pretends to have all this pop culture knowledge when she really has no clue other than what her publicist feeds her. It's going to be so hilarious if she's forced to refer to the video as a tribute to all these artists in interviews from now on, gritting her teeth.