Jennifer Lopez has spoken out about her fears for new X Factor USA judges, Britney Spears and Demi Lovato – saying the pair have to be careful to ‘be themselves’ when appearing on the super-famous panel show. Britney and Demi were announced as the new judges on Simon Cowell’s US show last night - and they have done nothing but express their excitement about the whole thing – but J-Lo has warned them that there is "a lot of pressure" and they will feel it.

Suggesting advice to the pair through ET Online, J-Lo explained, "Just be yourself. I think it's just about really being your true self, not trying to be something that you're not.”

She continued, "I feel a little scared for them because I was scared when I started. It's live TV - there's a lot of pressure that goes with it - but I think they'll do great."

It was clear Britney Spears wasn’t feeling any fear about the whole thing though. She told US Weekly yesterday, “I couldn't be more excited to join The X Factor judging panel. I'm a huge fan of the show and now I get to be a part of the action. Simon and L.A. better watch out!”

While Demi went for a more serious comment, which still showed a lot of positivity rather than nervousness.

She noted, “I am totally stoked to be here. I'm excited to represent my generation.”

Well, let’s just see what happens shall we. We know what can happen when nerves get in the way (ahem Chezza Cole) but we reckon these two will be pretty hardcore and give Simon a run for his money (literally).