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Celebrating 50 Years of Bikini BabesA Look at ‘Sports Illustrated’ Swimsuit Issue’s 16 Most Memorable Covers

To honor its 50th issue, Sports Illustrated commissioned models Nina Agdal, Lily Aldridge and Chrissy Teigen for a very cheeky cover.

All three beauties stun in the issue, which features the trio in nothing but barely-there bikini bottoms on a gorgeous beach — JEALOUS.

Shortly after the mag revealed its latest edition, the gals took to social media to express their gratitude.

Naturally, the 'zine got us thinking about all the other iconic shoots that have taken place over the past 50 years.

Scroll below to see everyone from Tyra Banks and Heidi Klum to Kate Upton and even the very first cover girl!