Although sometimes it looks good on girls - still here's it's an insane trend for girls to dye their hair black, always accompanied by a little overdone tan, mostly those girls who are into clubbing do that.. I don't even know why.
The worst cases of this are when a girl is a natural blond but dyes her hair jet-black, every time I get to know something like this I die a little bit inside.
I don't really care for the multi color hair styles. Where they have multiple steaks and one half is one color and the other is another color. Ick.
I personally like when people keep a color on their head that makes them look great. I've seen some brunettes look better as blond, some brunettes look better as a rehead, and some blondes look better as a brunette.
I have an acquaintance that has natural black hair and she dyed her hair blonde; imo, it looks tacky. But Giselle Bunchen looks great with blond hair, and you know that is color is dye and not real.