Spotted in Style: Demi Moore in Oscar de la Renta

Demi Moore opted for a vibrant purple Oscar de la Renta sequined mini as she stopped by the David Letterman show. Demi completed her look with satin gold Brian Atwood pumps, which I love! Demi stunned us all with that magenta Marchesa dress and now she's wowing us with this purple mini...hmmm, I wonder what color is next???