In more than 20 years, not much has changed for Kourtney Kardashian. Before she and her sisters became synonymous with lingerie-clad selfies, Kourt was already posing in her bra and underwear in front of the camera. Need proof? Look no further than her latest Instagram post.

"90s vibes only! (1999 to be exact!)," the eldest Kardashian sibling wrote alongside two throwback photos of her 20-year-old self in a black lacy bra and matching boy shorts. She wore her hair in a high ponytail with double face-framing tendrils pulled behind her ears — a signature style of the decade.