I love the way Kelly Osborne does young 'n fun, complete with a messy, lilac, poochy 'do and her printed TopShop frock. She can dress down or up, be glam or a rock chick, look good enough for the Golden Globes or a festival, and always changes her entire look to suit the occasion: hair, makeup, dress, shoes.

I've never been able to master changing my hair with my look, because I have a very classic face and my hair needs to be classic unfortunately. But that's what style is about - knowing what suits you, how far you can take it and when to call it quits on a trend that is not flattering.

Would you rock Kelly's messy purple pony? Her ultra fun cut out dress with giant wedges? It's just the kind of thing to wear when supporting your rock star dad at Chicago music festival, Lollapalooza, on the weekend.