Mariah & Nick on the Rocks?

Is the honeymoon over for Mariah Carey and Nick Cannon?

Just two months after their surprise Bahamas wedding, the lovey-dovey couple may be hitting the skids -- thanks to Mariah's demanding diva ways.

With his wife wearing the pants in the relationship, Nick is rapidly gaining a reputation as the most whipped man in Hollywood, something that naturally doesn't sit to well with him, a source tells OK!.

“He’s basically around to attend to her diva-ish ways,” the source says.

Shortly after arriving in Oahu, Hawaii, where Mariah was filming her new video for “I’ll Be Lovin’ U Long Time,” Nick, 27, diligently played the part of personal assistant. He dashed off to buy her gifts at Tiffany & Co. and Louis Vuitton, and when his 39-year-old bride hurt herself during the shoot, he was right by her side.

“He helped Mariah out of the pool,” an eyewitness tells OK!. “She looked like she was going to cry.”

Meanwhile, Mariah is taking charge of another aspect of her hubby’s life: his career!

“Nick had signed on to perform at a sweet-sixteen party before he and Mariah got married,” an insider tells OK!. “But now Mariah needs to oversee and approve his career moves. There’s no more silly Wild ’N Out, or small-time gigs. She wants him to do big venues and projects. She definitely wears the pants.”

The couple is set to appear at the July 4 opening of designer Christian Audigier’s Las Vegas club. For his part, Christian thinks the duo is still sizzling. “They look hot together,” he tells OK!.