Selena Gomez. [Photo/Agencies]

Selena Gomez says her first fragrance campaign is "very sensual".

The singer-and-actress - who is currently dating Justin Bieber - is wearing a sexy purple dress while she is submerged in water in the ad for the self-titled perfume and she is thrilled with the results.

She told People: "The water is actually lit from underneath, so it made it look pink and purple, like the colours of the bottle. I wanted it to look like I was swimming in my fragrance.

"It's very romantic, very sensual. But it's fun and beautiful at the same time.

"I don't really understand why I decided to be underwater [in the ad] but it looked cool!"

The scent features notes of raspberry, chocolate, and vanilla - with fans helping choose the ingredients - and hits Macy's stores and macys.com in mid-May.

Selena, 19, recently said she was hoping the fragrance was the first of many.

She said: "I'm so excited about my new fragrance which will be coming out soon. I think we're just going to name it after me for the first one because I think it would be simple to just do that for right now but I'm hoping this is the first in a line of perfumes, we'll see.

"It's going to be something different too because my fans are going to help me choose it so it'll be very fan involved. I've had some great suggestions from my fans already, they've been choosing some really good fragrances so it's very exciting."