Gossip » Demi Lovato and Kelly Clarkson Duet: Have a Merry Little Christmas!

Demi Lovato and Kelly Clarkson took to the stage as a pair last night at Z100's annual Jingle Ball concert in Madison Square Garden and delivered a heartfelt musical message to fans:

Have Yourself a Merry Little Christmas!

Could Demi match the first-ever American Idol note-for-note? Of course not. But who out there can?!? Sit back and let these two artist serenade you with a holiday classic now:

Demi Lovato and Kelly Clarkson - Have Yourself a Merry Little Christmas