Sundance Film Festival 2012

There's a lot of air kissing going on these days in Park Citry, Utah, where celebrities have gathered for the annual Sundance Film Festival. Here, musician Tommy Lee, left, greets another guest at a a party on Jan. 23, 2012.

Keep clicking to see which other stars have traded their red-carpet formals for the ski resort's sweaters and mittens.

Credit: Getty Images