Kevin Rudolph
Just because a song has a beat and is danceable doesn't mean it's not deep. Take Kevin Rudolf's hit "Let It Rock" featuring Lil Wayne. The song was written when Rudolf was in a fair amount of pain, unsure of his place in the world. Now it's a triple-platinum club favorite.

"Emotional doesn't have to mean sitting there depressed with a piano, sulking," Rudolf says. In fact, Rudolf calls Survivor's "Eye of the Tiger," written for Rocky III, an emotional song. "It can be things that hype you up and make you feel great and empower you. That's also emotional."

Rudolf is gearing up for his sophomore solo album, To the Sky, due out later this spring. The first single, "I Made It," featuring Birdman, Lil Wayne and Jay Sean, is making its way up the charts.

It took him a few months to name the album—no easy feat given the success of his first effort for Cash Money/Universal Republic, 2008's In the City.

"I couldn't settle on a name," Rudolf says. "I was in Canada getting ready to go onstage and I got this light feeling, and I just looked up to the sky. Everything I do 'to the sky.' It's powerful, but also limitless and spiritual. Dreams coming true, that's what its about."