Popsugar Fashion Gigi Hadid Gigi Hadid's 21st Birthday Dress in Las Vegas Naturally, Gigi Hadid Saved Her Sexiest Birthday Look For Sin City May 1, 2016 by Samantha Sutton View On One Page Photo 1 of 4 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 1 Gigi Paired Her Patterned Dress With Over-the-Knee Boots Taking her sexy look to the next level. Previous Next Start Slideshow Gigi Hadid