Alicia Keys had something of a wardrobe malfunction when she poured herself into dress which fit like a second skin for her appearance on "The Late Show with David Letterman." 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.
