Tom's been Katie's biggest influence, transforming her from a teenager into a sophisticated woman. However, her recent cropped hairstyle was encouraged by Posh.

"Tom has always said that he likes long hair," says the insider, who adds that he's also worried about Posh's influence on Katie when it comes to fashion.

"The tragedy is that one area in which nobody should take Posh's advice is fashion. Katie is naturally stunning and doesn't need hotpants or trendy haircuts to look great. Following Victoria's advice makes her look cheap, but she's desperate for approval.