I think it's hiphop communities that like the big ass most. Obviously plenty of guys who aren't into that like big arses too, but it seems to be a huge thing (no pun intended) in the hip-hop/r&b scene
This girl was apparently into that kinda thing herself - wanted to be an artist and was in videor or something.
I do agree it was a stupid thing to do, going somewhere like that. But the vanity part can be applied to loads of women. Look how many women get boob jobs and botox and stuff