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A slew of celebrities are teaming up to appear on "Hope for Haiti Now: A Global Benefit for Earthquake Relief," the global telethon being co-organized by George Clooney airing this Friday, January 22, at 8/7c.

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The latest stars to pledge to help out with the telethon are Robert Pattinson, Brad Pitt, Julia Roberts, Denzel Washington, Tim Allen, Halle Berry, Tom Hanks, Matt Damon and many more. Not to mention a number of additional musical performances including Beyonce in London, Madonna in New York City, and Haitian artist Emeline Michel in Los Angeles.

Wyclef Jean, Bruce Springsteen, Jennifer Hudson, Mary J. Blige, Shakira, and Sting will join Madonna in New York City to perform. Alicia Keys, Christina Aguilera, Dave Matthews, John Legend, Justin Timberlake, Stevie Wonder and Taylor Swift will be in Los Angeles, while Bono, The Edge, Jay-Z, and Rihanna will be with Beyonce in London.

Best of all, the musical performances will be available for purchase for $.99 per song in Apple's iTunes Store days following the telethon with all proceeds benefiting Haiti relief funds managed by "Hope for Haiti Now" charities.

Guided by Clooney in L.A., Wyclef in New York City and CNN's Anderson Cooper reporting from Haiti, "Hope for Haiti Now" is airing on an unprecedented number of stations including ABC, CBS, NBC, FOX, CNN, BET, The CW, HBO, MTV, VH1, and CMT. It will also feature more than 100 of the biggest names in film, TV and music supporting the cause with testimonials and by answering phones during the telethon.

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