The 21-year-old reality star flaunted her svelte curves on Saturday in a headless Instagram selfie that left the focus on a simple black-and-white string bikini top and high-cut bottoms -- and that bod! RELATED: Kendall Jenner Goes Pantless, Rocks Giant Snake Tattoo for Fierce 'V' Magazine Cover "Chaos," Jenner coyly captioned the smokin' snap. The body-centric photos come after the model responded to hurtful reports that she underwent facial reconstruction surgery.