Related article: 'The Voice' Judges Sign On For Season Three Airing This Fall!

Fans of the hit singing competition show The Voice were treated to a special performance by celebrity judge Christina Aguilera on Monday night.

Christina took the stage to duet with the newest member of her The Voice team Sera Hill. The infamous singer chose Hill for her team after hearing her belt out I'm Going Down. Christina told Hill, "I just wanted to grab a mic and get up there and sing it with you." At which point, Hill replied, "Please do." Christina was then handed a mic and took the stage for the impromptu duet.

What do you think of the Christina and Sera's duet?