Even Simon Cowell admits that she was "uncomfortable" on the show. As for why they hired her in the first place, Simon said, "I think if I'm being honest with you, there was a time where everyone was trying to up themselves in terms of who could find the biggest known star to be on the panel."
While he's explaining the whole situation, he manages to stick a dig in there about The Voice and Christina Aguilera, calling her "the other one on The Voice, I can't remember...blondie? Christina!"
Although the dad-to-be wasn't exactly complimentary of Britney, we've heard much worse from him.
Watch the video below and tell us what you think of Simon's Britney and XTina digs.
Are you excited for the new season of X Factor?