Artists For Haiti, Justin Bieber, Michael Jackson, Nicole Scherzinger, Jennifer Hudson, Jennifer Nettles, Josh Groban, Tony Bennett, Mary J. Blige, Janet Jackson, Barbra Streisand, Miley Cyrus, Enrique Iglesias, Jamie Foxx, Wyclef Jean, Adam Levine, P!nk, BeBe Winans, Usher, Céline Dion, Fergie, Nick Jonas, Toni Braxton, Mary Mary, Isaac Slade, Lil Wayne, Akon, T-Pain, LL COOL J, Snoop Dogg, Busta Rhymes, will.i.am, Swizz Beatz, Kanye West