While still celebrating Unapologetic becoming her first #1 album, Rihanna has another reason to celebrate. On tomorrow's official Billboard charts her single "Diamonds" remains at #1 on the pop singles chart giving her a coveted "double" topping both the album and singles chart. She is only the second artist to accomplish the feat this year. The other was Adele with her album 21 and single "Set Fire To the Rain." Last year Adele was the only artist to accomplish the feat. On the Billboard Hot 100 Rihanna holds off a surging Ke$ha who is at #2 with "Die Young." On the album chart Unapologetic earns its crown by selling 238,000 copies for Rihanna's biggest album sales week yet.
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