Mariah Carey will be taking to your TV screens tonight on ABC for a special showing, “Merry Christmas To You.” She will sing some of her classics, including “All I Want For Christmas Is You” (see above) and a duet of “Oh Come All Ye Faithful” and “Hallelujah Chorus” with her opera-singing mother Patricia, taken from her latest holiday album. Make sure to watch “Merry Christmas To You” tonight on ABC at 9PM ET.