Has Kate become too rexy for her own good?

"Kate has lost half a stone over the past three weeks and is virtually not eating at all," says a friend.

"Her skin is in a terrible state and her hair is ratty and unkempt."

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Kate Moss: Showing her age as she flashes her knobbly knees

Kate looking gaunt at Glastonbury

Kate has been on a strict detox diet of hot water and green leaves, but events of late have clearly taken their toll on the 33-year-old.

After Burberry and Agent Provocateur failed to renew her contracts, she then split with her on-off lover Pete Doherty.

"Many of her close friends worry that she is too thin," said the friend.

"Her professional and personal life hasn't been great of late and everyone has been telling Kate to put on a few pounds."

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Kate's hair: looking ratty and unkempt

The 'flawless' supermodel: Kate shows the unforgivable signs of cellulite

The supermodel has suffered further betrayals at the hands of junkie ex Pete Doherty over claims he is back with ex-girlfriend Irina Lazareanu - the girl Kate chose to model her Top Shop collection.

Pete was seen arriving to meet Canadian model Irina, at top London hotel Claridge's in London's West End before travelling to V Festival in Chelmsford, Essex.

According to the Sunday Mirror, the Babyshambles frontman, arrived in the late morning and spent a couple of hours inside the five-star hotel.

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Veins bulge on Kate's worn out hands

In more glamorous times: Agent Provocateur have not renewed her contract

When Pete finally emerged with Irina, the pair jumped into a blue people-carrier to travel to the V Festival in Chelmsford.

Kate also went to the festival but is reported to have been tipped off by pal Kelly Osbourne that Pete had turned up in Chelmsford.

Kate waited until late into the evening before showing up at Chelmsford when she knew ex Doherty was miles away on the Stafford stage of the weekend-long festival.

She hid backstage and only surfaced backstage to watch Kasabian from the side of the stage. Embarassingly for Moss, she was reported to have been moved on for not having the right pass.

She was later seen downing Barcardis in a VIP area and dancing with pals. The next day, Kate spent the afternoon drinking with friends in a north London pub.

Close pal Sadie Frost, was said to be so worried by Kate's out of control behaviour on holiday in Spain that she jetted out to Marbella to keep an eye on her.

A well-placed source said: "Kate is having a wild time in Marbella, they're out every night, drinking loads and she's really letting her hair down.

Kate and Sadie have had a very up-and-down relationship ever since Kate started going out with junkie Pete Doherty.

Sadie has never hidden the fact she doesn't approve of the Babyshambles frontman.

But now that Kate and Pete have split the girls have become very close again and Kate's really leaning on Sadie.