Fresh from performing on the X Factor final last night, the 34-year-old said he was a huge fan of the Marry The Night singer, 25, complimenting her ability to write hit tunes.
According to British newspaper The Sun, Chris said: 'She's very sweet. I think what undercuts it all, though, is that she's talented and she writes everything.'
He added: 'I just admire all of the hats and the dresses and the madness and everything because I know that underneath it all she can beat me at writing choruses.'