A single photo of Chris Rock and Eminem in a music studio has set off a flurry of rumors that the longtime comedian will be guest starring on the Grammy award-winning artist’s new album. Reports that Rock would make a cameo performance surfaced again this week when he refused comment on the claims.

The photo shows Rock in a music studio with Eminem, whose real name is Marshall Mathers. Rock, 48, tweeted along with the photo, “In the studio with Em, don’t sleep,” last week. The comedian discussed the post with Fuse TV Tuesday, neither confirming nor denying his presence on any of the artist’s upcoming tracks.

“I can’t really say. I’ve been on the Kanye record,” said Rock, referring to his guest appearance on West’s 2010 album “My Beautiful Dark Twisted Fantasy.” "Maybe I’m on the Eminem record. You never know.”

Some said the white male in the background of the photo isn't Eminem and appears to look much younger than the 40-year-old performer. Rock dismissed the claims, saying money, the “best lotion in the world,” can conquer age.

In April, Eminem’s longtime business partner and music producer, Dr. Dre, confirmed the artist’s next album would be released as soon as this summer. Shady Record President Paul Rosenberg said the record is scheduled to drop on an unspecified date after Memorial Day. Rosenberg said Eminem also is in talks for a world tour after the release.

“We fully expect to be releasing a new Eminem album in 2013. He’s been working on it for some time,” said Rosenberg. “We’ve got some dates locked in for him in perform live in Europe in August, so we’re trying to see what else lines up.” 

Eminem made headlines again this week after a death hoax surfaced claiming he was stabbed and killed in New York City. The message, which was spread via a sidebar advertisement on Facebook for Web site amazingvid.biz, shows the image of a unknown male, claiming to be Eminem, with what appears to be four deep stab wounds on his back. The rapper's rep denounced the hoax Wednesday, telling E! News that Mathers was alive and well.