Kylie Jenner and her sister Kendall Jenner are kicking off another hot-girl summer! Kendall, 28, supported Kylie, 26, at an event at Marquee in Las Vegas promoting 818 Tequila and the Kylie Cosmetics founder’s new vodka soda drink, Sprinter. The dynamic duo proved that while at work, sometimes it’s best to go back to style […]