basically your hair would need to be bleached to a light shade of blonde, pref platinum if you want a really bright pink. If you've got colour on the ends (especially old permanents) then these might need to be bleached upto 5 times to get all the colour out, and by then you probably wouldn't have much hair left! You then need to put a pink semi-permanent ontop of the hair once its been bleached and dried, the colour fades super quick so expect to be redoing it every two weeks ish depending on how often you do your hair. I think you're better off just going to a weave shop, getting some platinum blonde hair and dying it with semi-permanent pink, stick two clips on either side and clip it into your hair so it looks like you have a block of colour, thats what I do (much better for your hair aswell)