I was delighted by Anna Sui's spring/summer '09 collection!
Not only did she use beautiful shades of blue and green that I'm LOVING right now, but the silouhettes were so perfectly wearable and vintagey. I have a lot of both kicky, full, sorta 50s skirts and dresses, as well as straight 60s ones, and I think I'll be using my favorite looks from her collection for inspiration throughout the coming year.
I also love how she (as well as Marc) used beautiful scarves as belts. I'm wearing one today to transform a very straight dress into a more curvy shape.