Beyonce Knowles ad campaign for H&M Credit: Courtesy of H&M

She's a "Grown Woman" for sure! Beyonce is the star of H&M's new tropical-island themed swimsuit campaign, and the 32-year-old superstar showed off her world-famous body in multiple bikinis for the jaw-dropping ads. In one, the singer (whose Mrs. Carter World Tour kicks off Monday, April 15 in Serbia) boasts her toned, curvy physique in a yellow, crochet-style two-piece with a tropical flower in her hair, gold bracelets and huge hoop earrings.

She looks every bit the bombshell in a green-and-white tie-dyed bikini for a second image; in the third, skimpiest look, the "Grown Woman" singer reclines on a pool raft in a tiny, black fringe-bikini.

(Lest fans forget, Beyonce gave birth to daughter Blue Ivy Carter 15 months ago, and has previously said she gained 57 pounds during the pregnancy.)

The Grammy winner had a hand in designing the new affordably-priced swimsuits for the global retailer, Ann-Sofie Johansson, H&M's head of design explained. "I've always liked H&M's focus on fun and affordable fashion," Beyonce explained in an April statement. She added of the pieces: "I really loved the concept we collaborated on to explore the different emotions of women represented by the four elements -- fire, water, earth and wind. It was a beautiful shoot on a tropical island. It felt more like making a video than a commercial."

25 percent of proceeds from the collection, called H&M for Water, will be donated to H&M for WaterAid, which helps raise money for the world's poorest people to gain access to safe water.