She is the eldest of the Kardashian clan.

Yet Kourtney was out to prove the old ones are the best ones as she slipped into a stunning ensemble for a Snapchat session with her youngest sister Kylie on Wednesday.

The 37-year-old Keeping Up With The Kardashians star looked simply sensational in a scanty velvet crop top with Seventies-inspired flares to match.

Kourtney was enjoying an impromptu photo shoot with her 18-year-old sister in which she showed off her unique fashion credentials atop her stunning figure.

Keeping her surgically-enhanced assets under wraps, the brunette beauty sported a tiny crop top in a crushed velvet material with thin spaghetti straps tying into a halterneck.

While flashing her incredibly small waist and taut abs, she paired the look with high-waisted purple flares which skimmed her slender hips before extending into wide legs with a front pleat.

Keeping her accessories to a minimum, Kourtney paired the look with heavy gold bangles yet opted for no other jewellery – making her bold outfit the focus of the look.