Emmanuelle Chriqui and Lance Bass go head to head

Canadian-Moroccan Jewish actress Emmanuelle Chriqui, of Entourage fame, and former 'NSYNC heartthrob Lance Bass are battling it out. But don't worry, neither of their pretty faces are going to get hurt, and it's all for a good cause.

The two stars are competing to raise money for their charities of choice. Chriqui will donate to Colon Cancer Canada, a personal cause for her after her mother passed away from the disease, and her father is currently fighting it. Bass will donate the funds he raises to St. Jude's Children's Research Hospital.

But there's one catch: whoever raises less money has to perform an embarrassing task chosen by the winner. Chriqui revealed that if she wins, Bass will have to dress up in a dog costume he used to wear for a job before NSYNC and hike up Runyon Canyon in Los Angeles while wearing it.

To donate to the causes and to see who's winning, check out power-of-2.org.