Any Twilight fans who happened to be at Saturday night's Joan Jett concert at Harry O's in Park City, Utah, got a special surprise when the vampire flick's star Kristen Stewart made a surprise appearance on stage.
Right before Joan and her band launched into "Playing with Fire," she told the audience she had some people to thanks and waved Kristen and New Moon's Dakota Fanning onto the stage to a rousing round of applause from the crowd.
Of course, Kristen and Dakota both star in the upcoming film The Runaways, the real-life story of the all-girl rock band that kickstarted Joan's career. Kristen portrays Joan in the flick while Dakota plays bandmate Cherie Currie.
PICS OF KRISTEN AND DAKOTA FROM SUNDANCE:
"They looked pretty shy and waved," one audience member, who snapped the blurry pic below on her phone, tells OK!.