'Twilight's Kristen Stewart, Joan Jett onstage at Sundance

Joan Jett took the stage at Harry O's at Sundance Saturday night, Jan. 23, wearing a one-piece sequined leotard and sneakers. And guess who was in the audience cheering her on? Kristen Stewart and Dakota Fanning, who star in the biopic of her life.

After thanking the film's director and other folks, Jett gave a big shout-out to Stewart and Fanning, who had come onstage with her.