Natalie Portman’s was chosen as the new face for THE Parfums Christian Dior line. In her first advertisement for the line’s flirty perfume, Miss Dior Chérie, Portman, 29, appears topless wearing a simple black headband. Her makeup is simple, as she looks out at viewers in a flirtatious stare.

Unlike Portman, singer Rihanna is not just the face of a new perfume ad, but she is following the trend of other pop starlets such as Britney Spears, Katy Perry and Mariah Carey, by launching her very own signature fragrance called Reb’l Fleur, which is said to invoke sweet fruity and floral scents of her native country, Barbados. The fragrance will be available in department stores in February with prices ranging from $49-$59 for the fragrance and $30 for the lotion.

Are you more likely to buy fragrances when celebrities simply appear in the ad campaigns, or is it important that they create their own signature scent?