* Best-seller: This is a straightforward term indicating the perfume sells very well.
* Cult classic: This implies the perfume has a dedicated and passionate following.
* Signature scent: While technically, a signature scent is a perfume someone wears regularly and is known for, a very popular perfume can become a signature scent for *many* people.
* It fragrance/perfume: A trendy fragrance of the moment, highly talked about.
* Popular fragrance: This is a general term for a well-liked scent.
* Classic fragrance: This refers to a perfume that has maintained its popularity over a long period.
* Top-selling fragrance: Similar to best-seller.
The best term to use depends on the specific reason *why* the perfume is popular.