I am guessing thats "soulja gurl" lol
a recent internet phenome, She basically went off on the old lady for no reason at all, and amid her ranting she startted doing her version of some popular with the kids rapper's song lol
Its been crazy on the internet, and I do believe that the Atlanta authorities actually exectured a warrant for harrassing the elderly woman on the train. It was all over the news in ATL, enough so that the girls sister called in some radio station to plead with the public that her sister has a bipolar condition and the her not taking the medications ended up with the rant, crazy shit that happened that afternoon on the train.
If that is not soulja girl... then sorry lol but the link is not reachable to be because of the firewall at work