A lot of people use Moroccan oil for their hair. Personally, I rather use argan oil or coconut oil but that's besides the point.. Unfortunately, being blonde and using M oil is that it makes your hair very brassy! So keep your paws off this oil if you want gorgeous looking blonde hair that looks like you just walked out of a salon.
Another great tip for staying blonde is using a purple shampoo. Everytime I shower I use my personal favourite, Clairol shimmering lights. I only keep it in for 2 minutes though so you don't walk out looking like Grimace!. Just keeps it looking gorgeous and platinum until my next hair app!