Katy Perry & Josh Groban: Not Dating

By Jessica Herndon

Tuesday March 24, 2009 06:55 PM EDT

Katy Perry and Josh Groban

Jason Merritt/FilmMagic, Dimitrios Kambouris/WireImage

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Katy Perry and Josh Groban may sound like a perfect couple, but the two singers are not romantically involved, according to his rep.

"Josh and Katy are very close friends and hang out, but they are not a couple," Groban's rep, Luke Burland, tells PEOPLE in response to rumors of a relationship between the two.

Perry, who split with Travis McCoy in January, is currently touring her One of the Boys record. Groban, who is working on a new album, attended her Los Angeles show in February.