Why are Namie Amuros sales so high?

[chocopockymaster]

I think Namie's ~mystique~ is another huge reason for her popularity, if not her sales. She goes to extreme pains to keep herself and her private life out of the tabloids, and there's an air of mystery about her that makes her seem untouchable. She's SO shy and reserved in person and then she gets on stage and her confidence, stage presence, etc. is just through the roof. It blows my mind every time.