Britney Spears struggled to contain her nerves on the first day of filming The X Factor and suffered "panic attack after panic attack".
The pop superstar signed up as a judge for the reality TV show earlier this year (12), and she recorded her first appearance in May (12) - but Spears admits she got off to a shaky start.
She tells Elle magazine, "(I was) extremely nervous. I was having panic attack after panic attack."
However, co-judge and show boss Simon Cowell was on hand to help his new judge through her nerves.
He says, "On the first day, one hundred per cent she didn't think she was going to be able to do this. It's the Roman Colosseum - five thousand people booing if you say no. But I'm seeing this woman blossom week by week doing this. I think she's going to be good for the show, and I think the show is going to be good for her."