Nick Cannon is reportedly already feeling the strain of his two-month marriage to Mariah Carey as he struggles to deal with her demanding behaviour.

The couple - who exchanged vows eight weeks after meeting on the set of Mariah's Bye Bye video - are well and truly over their honeymoon period, according to insiders.

"Nick is basically around to attend to her diva-ish ways,” claims a source.

“When they were in Hawaii where Mariah was filming the video for 'I'll Be Lovin' U', Nick dashed off to buy her gifts at Tiffany and Co. and Louis Vuitton to keep her happy."

Mariah is also said to be taking on a very hands-on approach to her new husband's career.

"Nick had signed on to perform at a sweet-sixteen party before he and Mariah got married. But now Mariah needs to oversee and approve his career moves,” an insider tells OK!.

"There are no more silly small-time gigs. She wants him to do big venues and projects. She definitely wears the pants in the relationship."