Justin Timberlake and Jessica Biel jumped on the celebrities-who-support-Barack Obama bandwagon at the Last Chance For Change rally in Las Vegas.

The Sexy Back star took to the stage and urges Americans to Vote Obama at the event.

He told the crowd: “This is not my usual stage—and I’m a little nervous. This is the first time in my life that I am endorsing a political candidate.

"I’m not here as a musician or an actor or that guy that writes songs. I’m not here as a Democrat or a Republican. I’m here as an American.”

Justin continued, “I’m not here to tell you what to think but I urge you to think. I’m supporting Barack Obama because I’m inspired by him, by his voice, his intellect, his leadership and his judgement.”

Proud girlfriend Jess joined her man on stage and looked a little teary-eyed as he spoke.

We wonder if the two will get hitched while they're in sin city...

See Just and Jess endorsing Obama below and more stars gettin' political here