Beyonce, Madonna, and U2 Band Together For Internet Campaign

A big cause brings out the big guns! 

Madonna, Justin Bieber, Rihanna and 150 other major stars have all come together to bring awareness to the devastating food crisis in East Africa. They've all agreed to post a short film -- set to the 1973 Bob Marley & The Wailers song "High Tide Or Low Tide" -- on their Facebook and Twitter pages with the hopes of reaching one billion people.

Also joining in? Britney Spears, Lady Gaga, Bruno Mars, Kanye West, Jay-Z, The Rolling Stones, Jennifer Lopez, Muse, Coldplay and Sting. All of them wanted to get the word out about the emergency response to the major food and water shortage in Somalia and East Africa, where over 10 million people have been affected.

Aside from being seen on these stars' social networking pages, the song and film can also be downloaded through iTunes, from, or via Bob Marley's Facebook page, for $1.29. The Facebook page will also feature click-through links for direct donations to Save the Children's East Africa appeal.

Says Marley's widow Rita: "Not one child should be denied food nor water. Not one child should suffer. Along with Save the Children, we must stand up together as friends to put a stop to this, to feed our children and to save their lives."

Check out the clip above, and click here to donate.

By Ian Drew for Us Weekly. To read more of Ian's blog, click here.