'Twilight' Star Peter Facinelli Gets Himself Into Trouble ... On Twitter!

JigsawBy Nicole Guanlao

First CNN and Ashton Kutcher had one, and now it looks like “Twilight” star Peter Facinelli and friend Rob DeFranco are getting in on the action. These two pals are engaging in an old-fashioned battle of the "brawn": a Twitter-off, if you will.

Peter, who plays super-hot vampire “dad” Carlisle Cullen, has been challenged by his buddy to gain 500,000 Twitter followers by the end of the day this Friday. Rob even dedicated a webpage to the contest!

The stakes? Oh, they're pretty high.

If Peter loses, Rob will win the backing of his chair from the “Twilight” set, but if the onscreen vampire succeeds, his pal will have to sing Beyoncé’s "Single Ladies (Put A Ring On it)" on Hollywood Blvd… wearing a bikini.

Is it just me or are the stakes a little unfair? Wearing a bikini and singing "Single Ladies" — kinda like Joe Jonas already did — or getting the coveted backing of a chair?

Rob, I think you should have at least asked for the entire chair — armrest and all. Although maybe you should ask Peter to wear a bikini and sing Beyoncé’s hit single, too. That doesn’t sound too shabby either.

The bet actually got a little more interesting just this morning: Now we have a chance to get in on the little wager, too!

Peter posted a video announcing that if he wins the bet, not only will Rob shake his bod in a bikini to the tune of "Single Ladies," but he’ll also give the backing of his chair to one of his fans!

“I’d rather have one of my followers get it than Rob DeFranco,” said the actor.

As of right now, Peter isn’t doing too badly with about 198,000 followers, but I have a feeling he’ll be acquiring a lot more pretty soon. Ryan Seacrest, Perez Hilton and Demi Moore are helping Peter out. Will you?

Check out Peter and Rob’s Twitter pages and choose your side!