USA Today

Ashley Greene (a.k.a. Alice Cullen for those Twilight fans out there) is busy this holiday season. In addition to her hectic promotion schedule for box office smash hit New Moon -- the latest installment in the Twilight Saga series -- Greene has been working to help homeless youth, a growing concern here in the U.S.

What is she doing specifically to support this cause?

"This holiday season I'm filming the DoSomething.org 'Teens for Jeans' campaign PSA to encourage teens to donate their gently worn jeans to homeless youth," says Greene.

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