The Butts Riff-Off - Part 2 - Pitch Perfect 2 (2015) - TM & © #UniversalPictures The Treblemakers perform at the finals and Benji (Ben Platt) finally gets his chance to shine. The Bellas, the Treblemakers, the Tone Hangers, Das Sound Machine and the Green Bay Packers have a riff-off hosted by an acapella enthusiast (David Cross). #pitchperfect #pitchperfectmovie #benplatt #movieclips