In case you missed it, here are some highlights of their fun appearance:
Demi: "What's funny, we're trying to reach a younger demographic and I don't think we're gonna accomplish that when he's showing more cleavage than Britney and I are."
Simon: "You are very annoying, how's that?"
Demi: "You can be a bit of an a--hole, how's that?"
Demi: "You're actually really funny and I know it looks like we hate each other, and a little bit of me does, but you're actually fun to work with."
Simon: "So are you."
Awww. See? They do love each other! Fun stuff, guys. More please!
Conan ended the interview by asking Simon why people should tune into THE X FACTOR this week and the Brit joked, "Britney is doing half the show topless, on Wednesday, the first part of Wednesday."
Tune in WED and THUR at 8/7c on FOX for new episodes of THE X FACTOR.
What do you think of Demi and Simon's chemistry? Love 'em? Hate 'em? Let us know in the comments below!
Photo courtesy of teamcoco.com