Ella Henderson said taking part in The X Factor when she was 16 hadn’t fazed her – but it “terrified” her now.
The singer, who had a UK number one with Ghost, made her teenage debut on The X Factor 10 years ago.
Speaking on The One Show with presenters Alex Jones and Harry Judd, the 26-year-old said: “I know I talk like Louis Walsh saying ‘when I was 16’ but I was so young…J I’m 26 now and I could never do this.
“It would terrify me to go out on a Saturday and Sunday night to sing in front of the whole nation and have people judge you for what you love to do, but I still enjoyed every second of it.
“I think what attracted me to the show that year was the fact that you could audition with your own song and my dream was always to be a songwriter and show it and to have a way to show it to people.”
The songwriter, who released new single Brave last week, said his success on the show as a teenager was “baffling”.
She said, “I never thought I would end up in live shows and have this entry into the industry.
“I guess everyone has their own version of how he rose through the ranks, but it was a crazy journey and a crazy ride and I loved it.”
Henderson, who was mentored by judge Tulisa Contostavlos, placed sixth on the show despite being a favorite, while James Arthur was crowned the winner.
Crediting her family, she added: “I’m lucky to have an amazing family.
“I’m one of four siblings and I’m the youngest so I’m used to growing up around crazy big brothers…the X Factor was definitely like that all living together.
“My parents were always with me and I think I always had an old head on a young pair of shoulders.
“It’s weird, it didn’t phase me at the time, but I think if I tried to do that now, it would absolutely terrify me.”