Heidi Klum says perfume helps complete an outfit.

The supermodel believes it's important for women to wear a good fragrance as it helps them feel more confident and sexy.

She said: "For me, perfume is something to complete the look. It's almost kind of like great underwear.

"No one can really see it but it makes you feel sassier and sexier."

Heidi recently launched her latest scent, Shine, and says it was hard to come up with a unique smell.

She told People.com: "It's complicated. I really tried to look for something that didn't exist, which is hard. I think 23 or 26 perfumes come out every year, and it's hard to come up with something you haven't smelled before.

"Shine is a little more modern, powdery, but spicy. It's a great marriage of sweet and spicy."

The fragrance includes Pink peppercorn, sunflower, lily of the valley, pear, mandarin orange and vanilla.

The mother-of-four says smelling good has always been important to her and likes to cover herself in perfume.

She said: "I just kind of spray it everywhere. And then I spray everyone else, too.

"When we were in the elevator with security today, I sprayed it on all the guys. Some of them I've known for years, but there was another guy I didn't know."