Well, I'm a 31 year old male but my fiancee is 21 and these are what I love on her and what she gets loads of compliments on...
*Christian Dior Pure Poison
*Armani Code pour femme
*Creed Spring Flowers
Although these may not be the most exclusive or daring of fragrances they each are unforgettable IMHO and are quite "flirty" as we say here in the States.