Video: Olly Murs - I killed JLS' Aston!

Last updated at 16:51
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Check out our exclusive interview

Olly Murs tells Joe about the amazing prank the JLS boys played on him during filming for TV show 'Stand Up To Cancer'.

The former X-Factor contestant also reveals he'd like to be an X Factor judge if Simon Cowell wanted him to be.

He says being a runner-up on the show makes him the perfect mentor for new singers.

So check out Joe's exclusive interview here....