Mariah Carey mariahellenchampagne.jpgPhoto courtesy Michael Rozman/Warner Bros.

Mm-hmm, or is it because she's preggers?

Nick Cannon's wife was on Ellen today and, in an effort to put those pesky pregnancy rumors to rest, the clever talk show host offered Ms. Carey a glass of champagne...

"This is peer pressure!" exclaimed Mariah. Adding that champagne is "just fattening." And when she faked taking a sip, she explained it away with:

"It's too early for me. I only drink after 3 p.m."

Oh really? Even on the day of your infamous TRL appearance?