I seem to be starting off on a rather lip-obsessed note here, lol!
Best celebrity lips-both natural and not.
The obvious choice-Angelina Jolie. Actress, humanitarian, and owner of some amazing lips...after seeing her childhood pics, I'd surmise that they are mostly natural, too! Though in Hollywood, I wouldn't think it inconcievable that she gets injections to maintain their fullness (just speculation!)
Adriana Lima-VS model!
Joanna Krupa-Bikini Model.
Sophie Monk...I'm honestly not all together sure what she does, save dating a Madden brother? Still like her lips though, even a lot of people say they aren't natural.
Bianca Balti-fashion model.