Contributed by elgato:
In addition to Backstreet Boys singer Nick Carter, Kevin Richardson also attended the festivities for the 2004 Sundance Film Festival in Utah. He hung out with his bandmate Nick and his girlfriend Paris Hilton, as well as friends Shannon Elizabeth and her hubby. According to Access Hollywood, at one party, Paris got on stage and sang. Then, Kevin did the same.
They did, they began to sing together?