This event seems to have been both a pre-Oscars celebration, as well as a fashion show. (There were GM cars on the catwalk; a whole bunch of TV stars modeled the clothes. Then Beck performed.) One site says, "The event brought together the worlds of fashion, automotive design and entertainment under one roof." FINALLY!
Anyway, there are some photos of Beck's performance, but they almost all are close up of him. There was a band though but I can't figure out much about who was in it, but for now I am going to take an educated guess that it was Wounded Cougar. One report says he played the two songs below as well as "some of his best-known hits."