Stars including Lady Gaga and Beyonce have pledged to support a campaign raising awareness of the famine in Somalia.
The I'm Gonna Be Your Friend campaign has made a short film about the crisis, set to the Bob Marley And The Wailers song High Tide Or Low Tide.
The video is going on sale through iTunes and through Bob Marley's Facebook page.
Other stars supporting the campaign include Rihanna, Eminem, Justin Bieber and Jennifer Lopez.
Funds raised will be donated to Save the Children.
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