Mariah Carey -- She's Huge This Time of Year

12/4/2010 10:15 AM PST

Mariah Carey -- Pregnant Santa Dress

A pregnant Mariah Carey took to the stage in Florida yesterday to sing a few of her classic holiday hits while taping the "Disney Parks Christmas Day Parade" TV special.

Mariah fun fact -- her classic "Merry Christmas" album is the second best-selling album ever in Japan by a non-Asian artist ... behind only her own "Number 1's" collection.