Style Watch PollLast Night's Look: Hit or Miss?

Vote on this week's styles including Diane, Kate and more stars! You decide – are they fashionistas or flops?

Credit: Ramey

Updated: Saturday Feb 19, 2011 | 06:00 AM EST

The birthday girl goes for maximum effect to appear on Late Show with David Letterman, posing in a floor-sweeping teal dress.