Hmm...
That part at the start where she says look at me is off tune :|
And with your piano there were a couple bad notes that bcame really stacatto and stabby, but overall, pretty sweet.
That part where it went to 4/3 time was awesome, but when you added the transition out with the beat it sounded really weird.. :P
The part right after that was amazingly cool :P
Your beat was pretty wicked too :D
I agree with nanyt on the repetitiveness part. Not neccisarily the piano, but, yeah it was repetitive.
Tempo changes were awkward :P
Overall ratings:
Style: 9
Transitions: 6-7
Tune: 8
Chord prog: 9
8/10
4/5
Good job, man, you have potential!