Why are Namie Amuros sales so high?

[Baernash]

As few people mentioned above she hasn't change her image drastically trying to be sexy, half naked slut etc. Koda Kumi lost a lot when she started to copy obscene behavior of popular western singers. Ayu did the same, because in the past she was seen as someone with class but later swap to wearing corsets and doing show with group of gay-acting dancers and clows touching her bum. Namie's image is always stylish.