perfumes are so personal, though.
what smells good on one person will smell awful on another and what one person likes on herself another won't.
does she have a fav already? or expressed an interest in a particular one?
i adore perfume, and collect them, basically, by asking for them as birthday, Xmas and anniversary presents.
but to me what i wear is dependent on my mood, the season, the event, etc.
so i'd say unless she has mentioned one in particular, get her something else.
i have to layer my scent because i don't hold scent well, so if perhaps your friend has mentioned a perfume she loves, how about getting her the body lotion or shower gel or hair scent.