I don't think this can be considered rap. With rap the vocalist at least has an attempt at keeping with tempo. This is more ranting to a hip-hop beat. How is this any different from their actual show? Less tanning and "smooching"?
I can't see how she ever thought for a second there's anything good about this! She must have the worst friends ever! Hell, I'm not an MC and I can spit lyrics better than this crap! After all, I too have GarageBand. Nonetheless -and this is her fatal flaw- just because you can do something doesn't mean you should.
We "diss" because you suck and something tells me you like the heat; otherwise you would have got out of the kitchen long ago.