What if Lady Gaga was a Classical Composer?

I love the tune from Lady Gaga's "Bad Romance," and it seemed to have a classical quality to it. So I created this set of variations on Bad Romance in style of several classical composers (Bach-Guonod, Mozart, Chopin, and Rachmaninoff).

Video: http://www.youtube.com/watch?v=PkwOXo9yL8s