X Factor judge Simon Cowell has reportedly had a huge 25 minute row with singer Jamie Archer last night, after he told him to change his song for tonight.

The Sun reports that Simon listened as Jamie rehearsed the Elvis hit ‘If I Can Dream’, and told the big haired songster:

“That was well below par. You are finished if you sing that.”

Insiders told how he continued: “You need to change your song and start learning the lyrics fast or you are not just going to let yourself down – but you’ll let me down too.”

He advised him to change to the U2 hit Angel Of Harlem (how that could be considered as a Big Band song escapes me)… but Jamie, replied: “I don’t know the words!”

The pair then took the row to Simon’s dressing room.

One source added: “They eventually calmed down but it got very heated – Jamie is absolutely shell-shocked by it all. We honestly thought he was just going to pack up his things and leave the show.”