Cosmopolitan: Happy Fourth of July from the ‘Pitch Perfect’ Treblemakers (VIDEO) By Cosmopolitan. Published July 4, 2014 at 9:15 pm Treblemakers' Skylar Astin and Ben Platt singing a verse from \"America the Beautiful.\" Photo by www.cosmopolitan.com Enjoy this patriotic little a cappella number, courtesy of the Pitch Perfect 2 director Elizabeth Banks' Facebook page. Read the story here.