"Scene" is a fashion trend, kind of like Emo. Well, alot like emo. I think the "looks" are inspired by Japanese fashions, all those bright colors and straight haired looks. I think the whole thing originated from club scenes on the west coast, hence the tag. Scene girls are annoying as hell, like all people who label themselves, including metalheads, goths, emo kids, etc. Annoying, but some of the pics i've seen of scene girls are just mouth watering.
Like yeah, she may be annoying. But I'd fuck the everloving shit out of her.
Try a google image search, for starters.