Wow. It's amazing what a transformation Kelly Osbourne has made over the last couple of years. We watched her grow up in front of our eyes and we've seen her slim down. Kelly's big weight loss came when she was a contestant on Dancing with the Stars, but she has worked hard to keep the weight off and she's looking good!

Kelly performed with the Pussycat Dolls last night and I'm sure she didn't disappoint. She looks absolutely amazing in these cute little outfits, and I'm sure being truly comfortable in her own skin gave her the confidence she needed to perform in those skimpy get-ups.

Check out more photos of Kelly's hot little outfits and PCD performance after the jump!