Britney Spears Talks About Christina Aguilera TV Clash

Britney Spears has joked that she is "elated" to be resuming her old rivalry with Christina Aguilera on primetime US television.

The two former pop princesses will be going head-to-head as The X Factor USAand the American version of The Voicehave been scheduled in clashing timeslots tonight.

Asked by Simon Cowell expressed his unhappiness with NBC for adding an extra episode of The Voice so that it clashed with The X Factor USA's launch night.

He said: "None of us are happy about it. It is literally what's known as 'spoiling the party'."

And speaking during an appearance on Ellen DeGeneres' show, SiCo also admitted that Khloe Kardashian was a possibility to host The X Factor USA.

"We have screentested a load of people," he said. "I know who I would like, but no, I've got to get it approved by the network, so I think it would be wrong to say at this point just in case the network say no.

"It could be a Kardashian. It could be a Kardashian. I think that would work.

"I mean, I'm quite a fan of not putting hosts on this show because I think it's going to give it a different dynamic, so we've got to find people who've got a great chemistry. But Khloe's definitely up there in the running."

SiCo was teasing Demi Lovato about Niall Horan earlier this week.