The tension is definitely rising ahead of tonight's X Factor show. Not only is Dannii Minogue reportedly fuming about the whole chair swapping incident, now Jedward are causing tensions in the house.

According to the Mirror, the twins are getting so much attention ahead of their next um... show-stopping performance that the other contestants are getting ever so slightly annoyed.

A source told the paper: "John and Edward have their most ambitious performance of the series tonight and have needed lots of rehearsal time to get it right but it has gone down like a lead balloon with some of their competitors, who feel the boys are getting special treatment.

"Some of the acts think it gives them an unfair advantage in the race to win the X Factor recording contract and have been bitching and moaning about it. In fairness, it isn't Jedward's fault. It is their most elaborate routine to date and they need to practise but the others are getting pretty fed-up."

And it's not just the practising bit that's getting on the nerves of their fellow contestants. It hasn't gone unnoticed that Jedward are always performing right before the phone lines open.

The source added: "Simon Cowell isn't an idiot. He realises that many viewers will be tuning in specifically to see them. He wants to keep them watching right until the very end.

"But this has upset some of their rivals. Everyone likes to perform towards the end of the show as it is closer to when the voting lines open and their performances are obviously fresher in the minds of the voting public."

Which would normally mean that the off-key singing and shabby out-of-time dancing would be fresher in our minds but clearly there is something in it... after all, Jedward are still on the show.

Jedward aren't the first celebrity twins to rise to fame...