Kirstie Maldonado, Scott Hoying, and Mitch Grassi are branching out into a new genre of music. The Pentatonix a cappella favorites, known in this video of the Evolution of Music, have now been inspired by the newest Disney phenomenon, Frozen. And who can blame them! We've all spent the last month trying to emulate Idina Menzel's amazing belt from "Let It Go."

Take a listen as these versatile performers take their crack at the Disney earworms.

Click here to read TheaterMania's Dream Cast of Frozen on Broadway.