The group is Bacchantae, an all-female a cappella ensemble. The song is "Bitches Ain't Shit," a Dr. Dre original rearranged by Folds. You've probably heard it before. Just not like this.
If you're at work, put on headphones.
Update 11:46 a.m.: So the video is apparently two years old, but has only recently been recovered from the glorious depths of YouTube anonymity.
