Keith Urban wasn't surprised by Nicki Minaj and Mariah Carey's feud on 'American Idol'.
The Australian singer - who is the third new member on the show's judging panel this season - said there was always going to be tension between the superstars because they are both so passionate about music and believes their falling out was inevitable.
Miley Cyrus turned down a judging role on 'The X Factor' USA because she didn't want to be a ''dream crusher''.
The 19-year-old singer was approached by Simon Cowell's team about joining the talent show as a panellist, but she rejected the role because she doesn't believe she would have been able to criticise the contestants' singing even if they sounded like ''nails on a chalkboard''.
The music mogul is a huge fan of the reality TV star - whose sister Khloe is in the running to be the new host of 'The X Factor' USA - as he loves her ''naughty side'' and insists she should be given a star on the Hollywood Walk of Fame.
Britney Spears finds judging on 'X Factor' ''electrifying''.
The 'Hold It Against Me' hitmaker - who joined the show alongside Demi Lovato after Nicole Scherzinger and Paula Abdul were sacked after one season - admits she was terrified when she first signed up but eventually got into the rhythm of the talent search.