After the devastating Haiti earthquake , Lionel and Quincy decided it was time to bring back "We Are the World." More than 80 of the world's most talented singers joined the project—including Tony Bennett , Barbra Streisand, Celine Dion , Justin Bieber, The Jonas Brothers , Pink , Snoop Dogg, Eminem, Jay-Z , Jennifer Nettles , Jennifer Hudson and Lady Gaga . "I've never seen so much excitement—Tony Bennett, Snoop Dog talking to each other. Lil Wayne, Barbra Streisand talking to each other," Lionel says. "Everyone stepped up, and it's beautiful."