Well, I never felt it was rap until We R Who We R. But she has been a great artist nonetheless. It's a shame such a good song isn't on the top ten. If will.i.am wasn't in it, I bet Crazy Kids would've risen.
What's funny is that the Juicy J remix is higher in iTunes than both the original and will.i.am remix
42. Crazy Kids (feat. Juicy J)
112. Crazy Kids
174. Die Young (feat. will.i.am)