Rapper/actor NICK CANNON has laughed off rumours his marriage to MARIAH CAREY is on the rocks, insisting they couldn’t be happier. Reports alleged that Cannon was tiring of the R+B superstar’s demands, with one source telling OK! magazine, “He’s basically around to attend to her diva-ish ways.” But Cannon has dismissed the claims. He tells People.com, “Marriage is amazing. It’s the best thing that ever happened to me.” For some reason I think he may be telling the truth although I had my doubts to begin with. Hopefully, they are for real, but Nick said pretty much the same thing a year ago when engaged to Selita Ebanks for a short period of time. ...