Among the voices in the 81-member choir were Pink, Lil Wayne, Kanye West, Nick Jonas, LL Cool J, Robin Thicke, Celine Dion, Akon, Rob Thomas, Wyclef, Jeff Bridges, Vince Vaughn, Barbra Streisand, Jordin Sparks, Good Charlotte's Madden brothers, Tony Bennett, Josh Groban, Snoop Dogg, Justin Bieber, Jennifer Hudson, Keri Hilson, Jamie Foxx, Tyrese, Katharine McPhee, Sean Garrett, Will.I.Am, Carlos Santana, Melanie Fiona, Enrique Iglesias, Toni Braxton, Jason Mraz, Miley Cyrus, Busta Rhymes, Nicole Scherzinger, Nicole Richie, Usher, Julianne Hough, Raphael Saadiq, Zac Brown, India.Arie, "American Idol" judge Randy Jackson, Musiq Soulchild, Heart's Ann and Nancy Wilson, Fonzworth Bentley, Kid Cudi, Iyaz, Bizzy Bone, Nipsey Hussle, the Beach Boys' Brian Wilson and Al Jardine, Trey Songz, Faith Evans, Mya and Gladys Knight.