Proof of Barack Obama’s star power: Jessica Alba, Kerry Washington and Ryan Phillippe are appearing in a video made by the Black Eyed Peas' will.i.am.

"I've been really active on the campaign trail," Washington told Usmagazine.com. "I missed the first [video] and I heard that they doing another one. I think it's so great that Will.i.am is lending his musical genius to this movement. Jessica Alba and I were there around the same time, which was great."

"I would like to see a cleaner Earth for my child that I’m bringing into the world very soon," Alba says in the video.

"Kerry was excellent about doing the video," video director Jesse Dylan told Us. "She really had a very powerful thing to say and she was very honest and compelling. For anyone who wants to be involved that's important."

George Lopez also appears in the video, chanting “O-BAM-A” to the beat.

Click here to read Obama’s exclusive interview with Us while on the campaign trail, and here for Clinton’s critique of her worst outfits ever.

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