Jewish rapper Matisyahu, rocker Travis Barker and pop star Ariana Grande have teamed up for an unlikely collaboration as part of U.S. First Lady Michelle Obama's ongoing campaign to promote healthy living. The three artists have recorded a track titled U R What You Eat (Salad Bar) for a new hip-hop inspired album, Songs for a Healthier America, which was put together by officials at Obama's Partnership for a Healthier America organisation and the Hip Hop Public Health group. Other tunes on the project bring together Ashanti, Gerry Gunn, Artie Green and Robbie Nova, while Shayna Steele, Jeremy Jordan, Our Time Theater kids and Bruce Springsteen's E Street Band guitarist Nils Lofgren have joined forces for another song. Executives at Obama's Let's Move! campaign, which aims to fight obesity and promote fitness among kids, hope the message to lead healthier lives reaches children via the music. Sam Kass, executive director of Let's Move! and White House assistant chef, says, "Cultural leaders and visionaries in our country can give these messages to kids in a way that's not preachy. Kids are going to be dancing and listening to the music. I think hip-hop in particular - so many kids love hip-hop. It's such a core part of our culture... and particularly in the African-American community and the Latino community, which is being disproportionately affected by those health issues." Jordin Sparks and hip-hop icon Doug E. Fresh are also among the artists featured on the album - their duet Everybody was released earlier this year (13). The Let's Move! campaign was launched in 2010 and featured a video from Beyonce, who reworked her song Get Me Bodied and renamed it Move Your Body for the Let's Move! Flash Workout initiative.