Just yesterday Mariah Carey posted a racy picture to Instagram for her husband Nick Cannon's birthday, but the rumor is, it's all a front.

According to rumors, both stars have been unfaithful, and the marriage is on the rocks. Mariah's bra-clad picture came only hours after she was contacted by the Enquirer, asking about her supposedly failing marriage.

Mariah has also been traveling without her wedding ring, and has been seen cuddling up to a few different people.

"All this cavorting around with handsome men has Nick seeing red," said a source. "He's about at the end of his rope with Mariah."

Do you think the two are having problems, or is this simply a rumor?

Source: bossip.com