Mariah's riffing on 'Always Be My Baby' with hubby Nick

At her marriage re-commitment fete Friday with Nick Cannon at their Beverly Hills home, Mariah Carey spoke openly about the couple's deep desire to have a child, a guest tells me.

The singing superstar's recent weight gain has reportedly been due to fertility treatments Carey has been undergoing.

"Not that a few extra pounds on Mariah bothers Nick at all. He likes his woman with a bit of meat on her bones," the friend said with a laugh.

While Carey has continued to hope she and Cannon can conceive a baby, she also reportedly is now looking into adopting.

A number of Carey chums report the entertainer has been deeply moved by the story of Sandra Bullock's long-secret adoption of little Louis -- first revealed publicly last week in that People magazine cover story.

Source: Chicago Sun-Times