Who’s ‘Lil Sweet’ In The Diet Dr. Pepper Commercials? [VIDEO]

Prepare to have everything you've ever known about the world be called into question.

Ok, maybe it's not that dramatic, but my mind was blown when I found this out.

Ya know Lil Sweet?  The tiny little rocker dude in the latest Diet Dr. Pepper commercial?

That's JUSTIN GUARINI.  Ya know, the dude who took second place in the first season of American Idol...when Kelly Clarkson won?

Getty / Chris Walker

Told ya. Mind. BLOWN.