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Rihanna's naked in bathtub for entire new video

Better let the water out soon, Rihanna, your fingers and toes will wrinkle up and you'll get cold. The singer performed her new song "Stay," a duet with Mikky Ekko, Sunday night at the Grammys, and on Monday, the video was released.

In the video, Rihanna undresses and slips nude under the cloudy waters of an old-fashioned bathtub while the song plays, singing while looking sleepy and somewhat shell-shocked.

The video's fairly safe for work -- you don't actually see anything other than a fuzzy outline of her backside in the bath -- but it's very sensual. Scenes cut back and forth between Rihanna and Louisiana-born singer Ekko, who is seen in the same bathroom without Rihanna -- though he gets to keep his clothes on.

"The video was really, really simple," Rihanna told E! "I pretty much stayed put in the bathtub."

The emotional ballad is from her new album "Apologetic," and the single has already charted at No. 4 in the U.K. We're guessing the sexy video will only help it climb the charts in the U.S.

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