as the title~thank so much if i got this~
You're asking a DIY community for a Top 40 singer's email address? Maybe try TMZ.
NOBODY knows. Stars don't want to be bombarded with mail from strangers any more than you do. Your best best would be to find out who her agent is and contact them (probably by snail-mail); they will then decide whether or not to pass your note along to the performer.