Featured in this video are: Bono, FOX news host and former presidential candidate Mike Huckabee, New York City Mayor Michael Bloomberg, media magnate Arianna Huffington, Somali-born singer and poet K'naan, former first daughters Jenna and Barbara Bush, George Clooney, Clive Owen, Jessica Alba, Christy Turlington Burns, Kristin Davis, Idris Elba, Colin Farrell, Joe Jonas, Liya Kebede, Annie Lennox, Justin Long, Rob Lowe, Ewan McGregor and Evan Rachel Wood.