Best shampoo/conditioner to keep blonde hair white

Best shampoo/conditioner to keep blonde hair white? my fringe has gon a bit brassy during the 3 weeks of it being blonde so is there any good shampoo/conditioner to return it vibrant blonde and to keep it that way? please rply xBest shampoo/conditioner to keep blonde hair white
Clariol shimmer lights shampoo and conditioner....it is purple and will neutralize any yellow tones that may deposit on the hair keeping it whiteBest shampoo/conditioner to keep blonde hair white
Pantene blonde expressions : )





EDIT: YOu can get it at walmart,target,drug stores. it usually runs around 3-4 dollars and it looks like this:


http://www.schlecker.com/Bild.aspx?Typ=2鈥?/a>


and conditioner:


http://ecx.images-amazon.com/images/I/41鈥?/a>





its for blonde hair and helps keep it color, : )
biosilk silver lights shampoo its a life saver!