U.S. presidential candidate Barack Obama has revealed some of the music on his iPod.

Hip-hop features heavily in the Obama household, it would seem, with Jay-Z and Kanye West proving particular favourites - for their business brains as well as their musical skills.

"I enjoy it [hip-hop], but these days I don't have the time to listen to it all the time," he said. "What I've appreciated, watching this hip-hop generation, is to see how entrepreneurial they've been. In the past, musicians oftentimes were commodities. I think they're a lot more sophisticated than in the past, and that is a wonderful thing."

How can a man this groovy NOT be president?