Style queen Victoria Beckham famously wrote a book detailing how to get that extra half an inch.

But in her revealing gold 'bacofoil-style' corset, the Spice Girl looks as if she is in need of it herself.

Victoria, 33, showed off her metallic look corset, which had the unfortunate effect of making her resemble a trussed up Sunday roast, as she rehearsed with her fellow Spices, in advance of their comeback reunion tour.

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Tin cups: Geri Halliwell checks out Posh's 'bacofoil' style gold corset as the Spice Girls prepare for their reunion tour which starts Sunday

Not only that, but compared with a similar corseted look at a photocall for the group when they announced their reunion tour earlier this year, Victoria has clearly lost inches from her once prominent bustline.

Earlier this week, the Spice Girl was seen at the filming of fellow Spice Girl Mel B's recording of Dancing With the Stars looking much less perky in a certain area.

With her once gravity-defying assets appeared to have deflated somewhat.

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Deflation: Posh appears to have lost inches from her bustline compared to when the Spice Girls first announced their reunion tour, and now, right, as they prepare for the first concert in Vancouver on Sunday

Embarassingly, the self-styled fashionista was once forced to admit she had had breast implants in a court document for a libel trial.

It is unclear whether her new look is the result of further surgery.

Posh's 'bacofoil' look came as sketches of their tour costumes, designed by Roberto Cavalli, were released.

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Designer threads: Roberto Cavalli's sketches show how the Spice Girls will look onstage in their specially created costumes

The Spice Girls reunion tour starts Sunday. And a nervous Posh is reported to have banned husband David from attending.

David said: "One minute Victoria is saying she wants me there and then it's 'No, don't come to the first show, as we'll all be too nervous'."

But, he added: " I'll be at the show a couple of days later in San Jose and have the boys with me. And I know Victoria will ring me as soon as the first show ends."

Rehearsal time: Geri, Posh, Mel C and Emma, seen during rehearsals for their world tour