NEW VIDEO: Rod Blagojevich Sings Elvis At Chicago Party!

A federal judge wouldn't let him appear on I'm A Celebrity...Get Me Out Of Here, but that's not stopping former Illinois Governor Rod Blagojevich from trying to launch a post-political show business career.

He surprised several hundred Chicago residents Friday night at a promotional party thrown by a sound company -- taking the stage and bursting into an Elvis Presley song!

Blago was paid for his hip-shaking performance of the Elvis classic, Treat Me Nice. And just to add to the wackiness, he was briefly joined on stage by a Fabio look-alike.  We frankly have no idea why.

The ex-Gov. is charged with trying to sell President Barack Obama's vacated Illinois Senate seat.