The American actress who is well known for her role as Quinn Fabray in hit television musical series, Glee, swapped her red and white cheerleader garb for something more sophisticated for an appearance on The Late Show With David Letterman. Dianna's foxy frock may have been inspired by the sultry photoshoot that she posed for in Flaunt magazine recently and Team LBD are loving her new look! This figure-hugging LBD belongs to the Stella McCartney Autumn 2011 collection which typically experiments with angular lines exemplified in this dress by hip accents and streamline pencil skirt. The cleverly clashing of a smooth fabric against velvet is bang up to date with this seasons styles that are promoting textile merges and fabric juxtaposition. The velvet paneling on Dianna's LBD exaggerates her already svelte frame  (must be all the cheerleading!) to sculpt a lustworthy hourglass figure. Dianna paired her glamorous garment with killer stilettos and a hot pink lip, which provided the perfect finishing touches to such a classy dress. If you want to emulate Ms. Agron's enviable cheerleader to fashion ringleader make over then browse of pick of this season's velvet vestments.