Britney Spears finds judging on 'X Factor' is "electrifying".
The Hold It Against Me hitmaker - who joined the show alongside Demi Lovato after Nicole Scherzinger and Paula Abdul were sacked after one season - admits she was terrified when she first signed up but eventually got into the rhythm of the talent search.
Speaking on The Ellen DeGeneres Show, she said: "I was really nervous. You have all these people behind you and you know they're rooting on you. It's a really exciting, electrifying thing to do."
Speaking about her judging style, Britney says she learns from the show's head judge Simon Cowell and always tries to be honest.
She added: "I used constructive criticism. I learned from the best.
"I prefer to be honest. I think that's the best way to go. I wouldn't want to be told something and then waste seven years of my life. I feel like it's the thing to do."
However, Simon - who judged the UK version of the show before heading up the US adaptation - was shocked at how quick she made her decisions about wannabe pop stars.
He added: "I've never heard someone say no to contestants to quickly in my entire life."