"Two and a Half Men" star Ashton Kutcher, who turned 34 Tuesday, posted a video thanking friends for all the birthday wishes - and urging them to help him end child sexual exploitation.

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Actress Vanessa Hudgens is helping Stand Up to Cancer by auctioning the gown she wore to the 2011 MTV Video Music Awards.

It's a Candie's Couture silk georgette and frosted baby sequin gown, designed exclusively for Hudgens.

The "Journey 2" star said, "Stand Up to Cancer is a charity that is very near and dear to my heart, and I had so much fun wearing this Candie's dress to the MTV VMAs last year, that I thought I should auction it off to support this fantastic cause!"

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Warner Bros. is joining forces with DC Entertainment to help end hunger in the Horn of Africa with the We Can Be Heroes campaign.

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For ways you can help, visit the official We Can Be Heroes website!

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Singing sensation Lady Gaga and her mother, Cynthia Germanotta, announced Thursday that they will officially launch the Born This Way Foundation (BTWF) on February 29 at Harvard University's Sanders Theatre.

Lady Gaga will be joined by some very special guests as she personally unveils the BTWF before a crowd of policymakers, non-profit organizations, foundation leaders and youths who are working to create a kinder and braver world.

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"Extra's" Jerry Penacoli caught up with Sean Penn, Mel Gibson, Demi Moore, Kim Kardashian and others at the Cinema for Peace benefit for the J/P Haitian Relief Organization.

Penn explained, "The fact that there are still five hundred thousand people in tarp shelters is frustrating and dangerous."

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Meredith Vieira, host of "Who Wants to Be a Millionaire," will honor the Great White Way with "Broadway Giveaway Week," airing Dec. 19 - 23. Check local listings or visit MillionaireTV.com for time and channel.

To kick off the week, "Millionaire" will feature the two lead actors from the hit Broadway musical "Mary Poppins" as contestants on Monday's show, who will donate their winnings to The Actors Fund.

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Actor and humanitarian Sean Penn -- along with his celeb friends Miley Cyrus, Zooey Deschanel and others -- released new PSAs, asking people to contribute to the J/P Haitian Relief Organization.

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"NCIS" star Pauley Perrette talked to "Extra" about one of her favorite charities, Cops 4 Causes.

"The way other people feel about celebrities... that's how I feel about cops," said Perrette.

For more information on the Cops 4 Causes, visit the official website!

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