Tonights viewers will have seen a mysterious person jump on stage during Jedwards excellent ‘Under Pressure’ performace.

Calvin ‘Ready for the Weekend’ Harris confirms it was him via his twitter saying “Was just thrown out of x factor for jumping onstage during Jedward with a pineapple on my head.”

Calvin was due to appear on the xtra factor after the show!
UPDATE: Calvin has twittered some more: 

At the end of the day, I had a pineapple on my head. Sorry if I caused anyone embarrassment. P.s I love Jedward.

Earlier in the day Calvin posted a picture of a pineapple to his twitter, with the word “Important” beneath it.