Emma Stone in a little black dress

Emma Stone makes a leggy appearance on Letterman in a little black dressBy Daily Mail ReporterShe's one of Hollywood's most in-demand comedy actress after her hilarious performances Easy A and Crazy, Stupid, Love.But Emma Stone shows she can be just as sexy as she is funny as she turned up the heat on the David Letterman's Late Show in a little black dress.The 5ft 6in actress showed off her toned