The blonde beauty walked the SI runway while showing off her amazing curves and busting out of three different bikinis Sunday in Miami Beach, Florida.
Although there were no signs of her boyfriend, Rob Gronkowski, the new cover girl was not alone as her friends formed a cheering section from the sidelines.
Next came a high-cut white one-piece with bedazzled reflective gold sequins that put her toned legs — among other things — on full display.
Last but not least, Kostek wore an awesome two piece rust-colored bikini with a matching flowing sarong.
In the caption, she shared a message about how she made it to the cover, writing “Trust timing, own who you are and know when you’re told you can’t do something ( like ever walk as a runway model) KNOW THAT YOU DAMN CAN.”