Hollywood stars aren't the only ones enjoying the festivities at Sundance.
A source on the scene told Access Hollywood that billionaire Microsoft founder Bill Gates was rocking out at John Legend and the Roots' performances at the Bing Lounge in Park City, Utah, on Saturday night.
Bill was described as dancing on a couch, pumping his fist to the music.
The bespectacled businessman, who has retired from day-to-day activities at Microsoft in order to focus on his charitable activities, recently launched a Twitter account and a new Web site to share his endeavors.
He was in attendance at Park City to catch a new documentary, "Waiting For Superman" – director Davis Guggenheim's first film since "An Inconvenient Truth." Bill is interviewed in the film, which focuses on the troubles of the U.S. public school system.
He told Reuters that he hopes the movie does for the issue what "An Inconvenient Truth" did for global warming.
"That would be the goal," he said on Saturday.
Related Content from AccessHollywood.com:
VIEW THE PHOTOS: Sundance Superstars: Movies That Got Their Start At The Sundance Film Festival
PLAY IT NOW: 2010 Sundance Starts Off With A 'Howl'!
PLAY IT NOW: All Access: Inside The 2010 Sundance Film Festival