Singer Alicia Keys had something of a wardrobe malfunction when she poured herself into dress which fit like a second skin for her appearance on a US chat show.

But unfortunately the r 'n' b singer looked decidedly uncomfortable in the fashionable frock and resorted to tugging at the hem of in a bid to keep the unruly garment in place.

And if further confirmation were needed that it were too tight, the dress revealed the imprint of her thong underwear.

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Too tight a fit: Seen in New York last night, singer Alicia Keys fashionable 'body-con' dress proved a little unruly for the singer, as she resorted to tugging at the hem to stop it from riding up

Dressed in a gunmetal grey lycra number which left very little to the imagination, Alicia's clingy 'body-con' dress - one of this season's big trends - showed off her fabulous, curvy figure to great effect.

However, it appears the 27-year-old singer was finding it somewhat difficult to cope with the tightness of the sexy look.

However, it didn't stop her flashing a megawatt smile, or stopping to chat to fans as she mingled with the crowds outside the CBS television studios.

Curvy Alicia, who ran the Greek Marathon last year in preparation for her role as a hit woman in film Smokin' Aces, has been a vocal critic of the size zero trend.

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Suits you: The curvy R 'n' B star looked fabulous in the clingy, fashionable dress, which she accessorised with grey suede open-toe shoe-boots and her stunning smile

She told Australian magazine Who: "I think that a woman is so much her curves and her many styles.

"We come in all packages. We are who we are and I definitely don't like it when young girls feel like they have to totally starve themselves. I think it's not attractive either, actually. Definitely not healthy."

The stunning songwriter and classical pianist, was appearing on the Late Show with David Letterman in New York to promote new album 'As I Am'.

She has recently resumed her tour after swollen vocal chords forced her to to cancel concert dates.

As well as making her big screen début in Smokin' Aces, she has also appeared alongside actress Scarlett Johansson in film The Nanny Diaries.