We're currently on the ground in Park City, Utah where the Sundance Film Festival is underway, bringing together famous actors, filmmakers, and even a few musicians. We caught up with fun.'s lead singer Nate Reuss, who talked about the band's six Grammy nominations and the whirlwind past year that saw the group catapult into the spotlight. Watch through to the end to hear his pick for his favorite movie of the year - you'll never guess what it is!">