SI Swimsuit 50th Anniversary: Model watch

Australian singer Cody Simpson and girlfriend model Gigi Hadid attends the 2014 Sports Illustrated Swimsuit 50th Anniversary Issue kickoff event at Swimsuit Beach House. (AP)

Models Rachel Hunter, left, Carol Alt and Daniela Pestova attend the 2014 Sports Illustrated Swimsuit 50th Anniversary Issue kickoff event at Swimsuit Beach House. (AP)

Model Molly Sims attends the 2014 Sports Illustrated Swimsuit 50th Anniversary Issue. (AP)

Veronica Varekova (AP)

Lily Aldridge (AP)

Christie Brinkley (AP)

Danish model Nina Agdal (AP)

Model Chrissy Teigen and husband singer John Legend (AP)

Australian model Jessica Gomes (AP)

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