"I'm involved in the music business," crows Pitbull on his sixth album. That's both an understatement and a credo. Since his 2004 debut single, "Culo," the Miami MC has made good business of music, turning out records with a ruthless devotion to formula. Planet Pit plays a bit like a business plan. There are guest spots by R&B stars (Chris Brown) and Latin lovers (Enrique Iglesias). There are baldfaced rewrites of the Black Eyed Peas' "I Gotta Feeling" ("Give Me Everything") and Eminem's "Love the Way You Lie" ("Castle Made of Sand"). But there's something charming about Pitbull's enthusiasm - he sounds most like himself when he's promoting his brand. In "Give Me Everything," he uses his song to advertise his billboards: "Me not working hard?/Yeah, right, picture that with a Kodak/Or better yet, go to Times Square/Take a picture of me with a Kodak.

Listen to "Castle Made Of Sand" feat. Kelly Rowland and Jamie Drastik:

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“The Pretender”

This song wasn't part of the planned track listing for 2007's Echoes, Silence, Patience & Grace, and was put together in a day. "It happened after we recorded a lot of stuff," said Dave Grohl. Yet it ended up as the album opener and the lead single. Grohl called it "a stomping Foo Fighters uptempo song with a little bit of Chuck Berry in it." The singer hinted at the lyrics' political overtones: "Everyone's been f---ed over before and I think a lot of people feel f---ed over right now and they're not getting what they were promised."