I'm LOOOOOOVING the new, skinnier Piper. Her thinner face is every bit as cute as it ever was (especially without makeup) but also allows her to "go glamorous" with a little make up. Normally, I hate make up but I think it works on Piper when she wants to look a little more "night on the town" as opposed to "skater girl." Either look is fantastic.
And the body? What's not to love? Maybe she's just working out and not eating like a teenager any more.
Whatever you're doing, Piper, keep it up!