What brand has the best almost platinum blonde hair coloring?

I really want to go almost as light as Christina aguilera or Gwen Stafani, what do you recommend?What brand has the best almost platinum blonde hair coloring?
In their hair aisle, most drugstores have little samples of what your hair will look like in the end. I think all brands work, but the choice is really yours.What brand has the best almost platinum blonde hair coloring?
boxed hair color is always a gamble. what might look good as a finished product on your hair could turn my hair into a horrible rainbow mess. honestly, if you're going to play with hair color, go to a professional. if you're tight on money a Supercuts or something is ok, because they will still fix it for free if something goes wrong, but if you try it yourself (like my sister did last week and her ';auburn hair'; turned out to be a brighter orange than a clown wig) you'll end up either with ugly hair or you'll have to spend more money on color correction. especially with bleach, which is what you would want to use to get your hair that blonde