The 39-year-old singer boasts a super toned physique, and the brunette beauty has revealed she maintains her slender frame by attending spin classes with the former England football Captain when she is in Los Angeles, California, because they both have the ''same favourite teacher'' at the fitness centre.
Speaking to Hello! magazine about her exercise plan and partner, she said: ''I've taken SoulCycle spinning classes with David in LA because we have the same favourite teacher that we love there.''
And 'The X Factor' judge has admitted fashion designer Julien Macdonald has asked the 'Right There' hitmaker to exercise with her and the football ace - who has sons 18-year-old Brooklyn, Romeo, 15, Cruz, 12, and six-year-old daughter Harper with his wife Victoria - at Barry's Bootcamp.
She continued: ''My friend [designer] Julien Macdonald was like, 'You, me and David are going to go and work out at Barry's Bootcamp'''.
However, the Pussycat Dolls band member thinks she will have to start training a lot harder before she joins David and Julien on a fitness class.
She added: ''Though I might have to shape up first.''
Nicole has revealed she also enjoys going for a run on her own to get in the ''right head space'', and to make sure she is not spotted by fans she hides under a pair of glasses and a hat.
She said: ''[To get] in the right headspace. I put glasses on and a hat. no one can keep up with me.''
And the star has joked if a passer-by notices her she ''runs off fast''.
She explained: ''And if people recognise me, I run off fast''.
Nicole has admitted Italy is her favourite place to go to when she wants a relaxing retreat.
She said: ''Italy has something special in the air. Venice, Florence, Portofino, Verona, Rome, Capri - I love them all.
''It's home to my heart and my spirit.''
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