Hair colour issue :'(

I dyed my hair a dark brown colour about 4 months ago (my natural hair colour is dark brown, don't ask why I dyed it that colour again.. Its a long story) anyway, I really want to dye my hair blonde now. Do you think I can just put a blonde hair dye on...

my hair or will I have to strip my hair with bleach in order to get blonde hair?

Definately have to strip it probably several times before you can put the blond colouring on, otherwise it'll probably go green!
xox

I think your're best off going to the hairdressers, because I did my hair blonde when I had it brown, and the blonde made my hair go bright orange and yellow 0.o
So I think you may need hairdressers advice x x