The 27-year-old singer recently moved to LA and is in the running for a job as a judge on the US X-Factor.
According to Now Magazine, she has enlisted the skills of Posh's stylists to help polish her image,
A source said, 'Top stylist Victoria Adcock, who helped Posh de-WAG herself, is putting together a series of ladylike outfits for Cheryl.
'She's also going on a strict diet and exercise boot camp.
'She has her pick of Hollywood personal trainers, but she wants Jennifer Lopez's fitness instructor Gunnar Peterson.
'She feels she's currently too heavy by LA standards and wants to tone up.'