Sports Illustrated: Latest bikini babes

Emily Ratajkowski flaunts her toned back in a red backless gown at Sports Illustrated's Swimsuit Issue 2015 Celebration.

Nina Agdal in a crop top and a mini pencil skirt at the Sports Illustrated's Swimsuit Issue 2015 Celebration.

Hannah Ferguson flaunts her cleavage in a low cut black sheer gown at Sports Illustrated's Swimsuit Issue 2015 Celebration.

Sport Illustrated swimsuit model Gigi Hadid, left, poses for a picture with a fan at an event in New York.

Model Gigi Hadid, from left, Chanel Iman and Lily Aldridge attend the Sports Illustrated's Swimsuit Issue 2015 Celebration.

Model Gigi Hadid looks pretty in a crop top with a plunging neckline and a yellow pencil skirt at Sports Illustrated's Swimsuit Issue 2015 Celebration at Marquee.

Hannah Davis at Sports Illustrated's Swimsuit Issue 2015 Celebration.

Genevieve Morton at Sports Illustrated's Swimsuit Issue 2015 Celebration.

Samantha Hoopes sports a grey gown with a risque cut at Sports Illustrated's Swimsuit Issue 2015 Celebration at Marquee.

Irina Shayk attends Sports Illustrated's Swimsuit Issue 2015 Celebration at Marquee in New York. Sports Illustrated is celebrating the release of the swimsuit issue with a festival where the public can meet the models and watch live music. Photos AP