This is one of my Pet Peeves - people who think that just because their skin is light, they will look good with blonde, red, or otherwise non-dark hair.
They won't. She doesn't, and in case any lurkers are reading this and feeling an unseen shoe wrap gently round your toes, you won't either.
I don't care if all your friends and family tell you how great it will look. Don't do it. Get some highlights if you want to, but don't bleach your whole head. It will turn to straw and horses will nibble you in the streets.