Scottish producer Calvin Harris presents the fruits of a prolific year and a half on the new album 18 Months. Rukes/Courtesy of the artist hide caption

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Rihanna's new video is the target of a lawsuit from photographer David LaChapelle. YouTube hide caption

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Katy Perry (left) and Snoop Dogg perform at the 2010 MTV Movie Awards in June. Christopher Polk/Getty Images hide caption

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The Record

Pop Off: He Raps, She Sings. Does It Still Count As A Duet?

Recent hits suggest that there's an imbalance of power between men and women on pop duets.

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The summer jam of 2007 can be summarized in seven syllables: "ella, ella, ay, ay, ay." Ellen von Unwerth hide caption

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Are Rihanna and Chris Brown sending each other notes over the airwaves? courtesy of the artists hide caption

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