Blonde dye over highlights?

So a couple days ago I got blonde highlights. They were done really well, but I wanted to be blonder then I am right now. So if I decided to dye my hair a blonder color over my highlights would that mess up my hair? If it wouldnt how long should I wait...

before I attempt it? My hair is naturally a medium brown but now its light brown. Thanks lots!!!

Wah you hair a few times so the colour goes lighter then dye your ahir the colour you want it ok? x

you should try it again when the color starts to fade. BUT unless you want a headfull of highlights (which could look good) you can get other lighter ones ontop of that. Yup, no1princess is right, wash it and it will fade a little bit, use something strong.. um lemon juice makes it fade a lot & so does dish/clothes soap. good luck !