Britney Spears

Britney Spears has become addicted to buying wigs, it has been reported.

The troubled star has allegedly traded her party addiction for shopping - spending more than $60,000 on wigs, vintage hats, clothes, lingerie, perfume and jewellery in less than a month.

A source close to the 'Toxic' singer said Britney "has turned into a shopaholic".

Addiction expert Dr. Robert Butterworth told US In Touch Weekly magazine: "People with addictions often go from one compulsive behaviour to another."

Mother-of-two Britney, 25, shaved off all her hair before entering Malibu's Promises rehab centre. The star was reportedly treated for a range of problems, including post-natal depression, following months of hard partying and drunken behavior.

While Britney was initially happy to display her shaved head, she soon opted to wear a variety of wigs.

Addiction specialist Clare Waismann said: "She's acting like a child. This is not normal behaviour. Her whole demeanour is strange. She's not doing well."

The star - who is hoping to revive her pop career - is believed to have sacked manager Larry Randolph for a second time.

Britney blames Larry for contributing to her recent downfall, including introducing her to party-girl Paris Hilton.