for me, it would have to be amy lee's gorgeous long hair from evanescence...I've been trying to grow mine out that long forever and anytime I get any length on it, the hair stylist wants to cut off two month's worth because it will make it look healthier and I always buy into the "I won't notice it" speech
The colour, the different styles she had and stuff, love em. Especially the long dark hair with bangs (and not side bangs or anything), through i love her hair anyway
and when i think about it Jennifer Aniston does had nice hair