After proving she could channel 80s disco in Xanadu, Kerry Butler is returning to her favorite musical decade as metal princess Sherrie in Rock of Ages. Five days before her first performance at the Brooks Atkinson Theatre, the Tony nominee gave fans a sneak preview by joining Constantine Maroulis and the rest of the cast at the Broadway on Broadway concert. Get a taste of what’s to come with their show-stopping rendition of “Don’t Stop Believin.’” And Tom Lenk fans, don’t fret: That’s him in the purple tee, making Franz’s one line in the song as campy as can be!