The Treblemakers is an all-boy a cappella group at Barden University (based on "On the Rocks" an all-male a cappella group at the University of Oregon) in Atlanta, Georgia who has won the International Championship of Collegiate A Cappella six times before they lost to the Barden Bellas. 　　It was shown that they won the Riff-Off, when the High Notes were disqualified when one of their members was shown stoned and both the Bellas and the BU Harmonics were disqualified for matching the word "it" (It Feels Like the First Time) to "it's" (No Diggity). 　　In the sequel they perform Lollipop to the freshmen at the school's new students orientation. In the riff off, they were first cut off since Benji discontinued performing their song because he saw an 'angel' in his eyes (in fact it was actually his crush).