Mariah and Patricia Carey

Video: Mariah Carey’s Christmas Special

Mariah Carey decked the halls with seasonal tunes for ABC’s “Mariah Carey: Merry Christmas to You” special, taped last month at L.A.’s Orpheum Theatre. The mom-to-be performed old and new songs from both her holiday albums, including a touching duet with her opera singer mother Patricia Carey on “O Come All Ye Faithful / Hallelujah Chorus” and her classic “All I Want for Christmas Is You.” Watch highlights from MC’s Christmas spectacular below.