Travie McCoy doesn’t work in a specific genre – unless "crossover" is a genre. And this potential summer smash, cut with his band Gym Class Heroes, highlights his skill at pop that floats between styles. "Stereo Heart" is a little bit hip-hop, a little bit disco, a little bit dark-synthed club music; and, with Adam Levine replacing Bruno Mars on the hook, it’s a lot like Travie’s hit "Billionaire." When Levine croons, "Make me your radio," it also (unintentionally?) channels Joni Mitchell's 1972 folk-pop masterstroke "You Turn Me On, I'm a Radio." Travie contains multitudes.

Listen to "Stereo Heart":

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“My President”

Young Jeezy teams up with Nas on this track, in which he compare his own success with the idea of an African-American winning the Democratic Party's nomination in the 2008 presidential election. "When I pulled up in my car, that s--- was unbelievable to people in my neighborhood because they were like, 'We grew up with him. How the hell did he accomplish this?'" he told Rolling Stone. "I feel like it was the same way with Obama. I grew up all this time, but I've never seen a black man this close to running this country."