Is it bad to use loreal extra bleach blonde hair dye over pofessionally done highlights/coloring?

what color should I dye parts of my hair what colors will look good <RANDOMNESS XP>

I am getting quite sick with extentions and want to have real coon tails, but what would be best if I want to dye them purple...

I have dark brown hair and green eyes,what is the best highlight color or my hair

Can I cover my hair with suran wrap after I have colored it? how long can I keep it on?

Ok, I bought a semi-permanent purple hair dye from hot topic. I want to streak my hair however I refuse to bleach it. I have ...

I have light brown hair with blonde highlights, is it OK to permanantly dye it blonde? Help?

i have blonde hair with brown highlights in it but i want blonde how do i do that???

Okay I bleached my hair in highlights two days ago and its really ugly and I want to dye it brown is that okay or will my hai...

I have light brown hair with lots of natural blonde highlights. I don't want to ruin the colour of my hair, so I want to ligh...

I would like to die my hair blonde but my natural hair color is black and I would like to bleach it without having to go to a...