A guy named Mike Tompkins does a cappella versions of pop songs on YouTube that don't actually sound like they're a cappella . . . because Mike does every instrument using either his voice or his mouth.
In his last two videos, he did "Dynamite" by TAIO CRUZ, "Teenage Dream" by KATY PERRY, and "Just The Way You Are" by BRUNO MARS.
And he'll be on "The Ellen DeGeneres Show" tomorrow.
