Sundance 2013 kicked off this weekend, and film buffs flocked to Park City again this year. From Dave Groh's sold-out concert at Park City Live with Stevie Nicks, to Jessica Biel and Ringo Starr hanging out at The Westway, to Avicii and Matisyahu's blow out performances, here is a round up of some of the top bashes from Sundance's first weekend.