Dancing with the Stars' Chelsea Kane, Lil' Romeo, Mark Ballas and his new ladylove Pia Toscano are belting out their own version of Rebecca Black's YouTube hit "Friday." You have to wait til' the end to see Pia!

We're kind of diggin' the way the quartet sounds together. Who knew Mr. Ballas had such skills with his mouth?

Oh, the power of the internet.