There’s trouble in paradise for Rihanna and Chris Brown. Rihanna has sparked rumors that R&B’s hottest unconfirmed couple is on the rocks after the Barbados-born beauty was busted inching and pinching on rapper Kanye West as they hung out backstage at a Hollywood concert on October 3.

Rihanna was spotted cuddling with Kanye during T.I.’s concert at the Key Club in Hollywood earlier this month.

“Rihanna and Kanye hung out together after they performed their songs,” a Star Magazine snitch blabs. “Rihanna was sitting on Kanye’s lap, singing along to the music. Before long, the two were full-on kissing each other.”

“People were shocked,” the spy adds. “After a while, Rihanna must have realized people were watching, because she had her security escort her back to the dressing room.”