Kim Kardashian, 40, has sizzled in her latest bikini pic! The KKW Beauty founder took to Instagram on May 7 to share a pic of herself in a black, stringy bikini. “MAYDAY,” she captioned the photo, which showed her posing on a tree trunk on a golden, sandy beach. She put one hand up to her head as she flaunted her toned physique in the black two-piece, and accessorized with dark shades.