Girls Aloud star Kimberley Walsh has criticised 'X Factor' judge Louis Walsh, calling him a "nightmare".
According to The Star, the singer said that Walsh was wrong to publicly criticise fellow judge Dannii Minogue.
The Girls Aloud star said: "Louis has said he wants Sharon Osbourne to replace Dannii as she's his friend and Dannii's just an acquaintance."
"He doesn't know when to keep his mouth shut, he's a nightmare."
The singer also praised Dannii Minogue, saying: "I agreed with her on a lot of things."
