Hark the herald angels sing! Mariah Carey shows where she gets her powerful pipes from in the video for “O Come All Ye Faithful / Hallelujah Chorus.” A pregnant Mimi duets with her opera singer mother Patricia Carey on their yuletide collaboration from Mariah’s holiday album Merry Christmas II You. Mother and daughter are joined by MC’s husband Nick Cannon in the studio for a merry old time, mixed with footage from holidays past.

The festive diva appeared on Home Shopping Network’s Cyber Monday to sell her shoes, CDs, jewelry, and perfumes. Watch her get a surprise phone call from Nick below.