That's the one-and-only "WEIRD AL" YANKOVIC in "The Weird Al Show"! (Specifically, as entrant Dave Rossi of Nutley, NJ, noted, the bite was heard on Episode #3608 [first aired: October 11, 1997], "The Competition.")

Congratulations this week to A.J. (aka "Dyslxicnot") of Ventura, CA, whose entry was randomly selected as the winner of a copy of the demented song of his choice.