NEW YORK, NY  [Friday May.26.2006]  /Mix103FM.com/ -- Rihanna's still getting lots of mileage from her hit song "S.O.S.," but she's already released a new single featuring labelmate Ne-Yo.

Rihanna and Ne-Yo duet on the ballad "Unfaithful," which is the second single from Rihanna's new album "A Girl Like Me."

And just like "S.O.S.," the track "Unfaithful" looks like it will be a hit. Earlier this week, the song's video topped MTV's "TRL" countdown, grabbing the No. 1 spot.

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