Sunday, August 7, 2011 6:12am ET by  
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Simon Cowell calls Paula Abdul "loopy"

Simon Cowell has called fellow future US X Factor judge Paula Abdul "loopy".

Speaking to People, he says: "I like loopy. I can be a bit loopy at times, and I can hang out with her socially because she gets on with my friends. We have a similar sense of humour and I tell her there are no rules on this show, so don't worry about how you want to behave."

Cowell also continues to compare his relationship to Paula Abdul like "owning a dog".

He says: "and the dog will only sit next to its master. It's comfortable. If she's away from me, she pines. She's unhappy. She has to sit next to me."

Cowel and Abdul worked alongside each other during American Idol. The brand new premiere season of X Factor opens in the US on September 21 on Fox. 

Both fellow judge L.A Reid and Cowell have recently signed up to gruelling fitness and diet regimes in an effort to get fit for the show.

Watch the theatre trailer below: