Mariah CareyNick Cannon won't reveal whether or not his wife, Mariah Carey, is expecting their first child.

Baby rumors have been swirling around the couple for months, but Carey's recent performance in Brazil has reignited speculation that the singer is pregnant.

"I've said it before and I'll say it time and time again -- when my wife feels like talking about whatever she wants to talk about, you will hear it directly from her," he said on his radio show, when confronted with the question by gossip-blogger Perez Hilton, who claimed Mariah was looking heavier at her concert in Sao Paulo.

"There comes a point when there's no denying anything if it were to happen," Perez countered back at Nick.

"Honestly ... I say this to you so you can tell whoever it is you've got to tell, we all know it's extremely personal, and it is for a woman to deal with things with her body, and especially when dealing with the idea of childbirth and all that stuff," he answered.

"We know that we're public figures and that's something, but ... that's something that you want to keep near and dear ... until you're 100 percent sure in any situation," Cannon continued.

"There's a certain time limit that you're supposed to wait before you actually can officially say that you are. You've got to take all those things into factor and it gets really heightened when you're one of the most famous people in the world because you don't want to mislead anybody," Nick added.