In quotes leaked from Cheryl Cole's autobiography, Cheryl - My Story, which hits stores tomorrow, the singer also branded the X Factor 2012 judge 'odd', adding their first encounter was 'awkward' and 'embarrassing'.
'The first time I met Nicole was when she was performing on The X Factor in London,' she said.
"'Oh my God, Cheryl! You're just as pretty in real life! I heard your song on the radio!" she had gushed. It was really embarrassing.
'Then she started singing 'Promise This' to me, and I swear to God the woman sang the whole song, to my face. It was just so awkward, and every time I stood next to her she started singing it again.
She continued: 'I thought how that would be like me going up to Britney and singing the whole of 'Baby, One More Time' in her face. Can you imagine how weird that would be?'
Cheryl also opens up on her US X Factor sacking and battle with malaria in the new book, revealing she was told by nurses death was a 'possibility' after falling ill.
WATCH: Behind the scenes on Cheryl Cole's Marie Claire shoot
Cheryl - My Story is in stores tomorrow.
Will you be buying Cheryl Cole's new book? Let us know in the comments box below...