The Barbershop Quartet

&nbsp The barbershop quartet is a group of four boys who appear in Beggin' on Your Knees. They are in Tori and Robbie's singing class, and they enjoy harmonizing with each other. They performed together at the Moonlight Jam, although at first the teacher was only allowing solos and duets. After lots of pleading, the teacher got fed up with them and allowed them to sing as a quartet. In the Beggin' on Your Knees photo gallery, Tori says they are touring on an NYC subway because it was better than performing at Dingo land.