Kate Moss caused a stir at the launch of Carine Roitfeld's book launch in Paris in February, as her presence usually does.

This time, however, it was not the rock-star aura of the British supermodel that created a buzz, but her outfit.

The 39-year-old wore a Saint Laurent Paris ensemble that was straight off the fall/winter 2013 runway - a black jacket over a bodysuit. But unlike the runway model, who had a skirt on, Moss left her house without putting on her pants.

While some felt her outfit was in sync with her reputation as a fashion maven, others wondered if it was a cry for attention.

As veteran fashion show producer Daniel Boey says: "There's a fine line between breaking the rules of fashion and showing a complete lack of taste. In this case, it reeks of bad taste and desperation."

But Moss is not the first style star to go without pants in public. In the past year, Rihanna, Miley Cyrus and Beyonce's younger sister, Solange Knowles, have also gone bottoms-free at various public events.

A rash of overly sexy dresses, with plunging necklines down to the navel and slits up to the hips, have also been spotted on the red carpet, with stars such as Heidi Klum, Halle Berry and Jennifer Lopez all raring to bare as the stakes go up.

Mr Boey says: "Sex sells, as they say. So, many are going in that direction to get attention. But one can be sexy without being vulgar."

The red carpet, however, is no longer the only platform for celebrities with a penchant for exhibitionism.

Social media tools, such as Twitter and Instagram, are fast becoming avenues for celebrities to share personal pictures of themselves - sometimes in various states of undress.

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Click on the thumbnails for celeb fashionistas' worst looks on the red carpet.