Kate Middleton's luscious, thick eyebrows have kept fans wondering how the Duchess of Cambridge achieves such a full look, with speculation about tints and tattoos. Well, wonder no more as her beauty secret has been revealed! The Duchess uses Bobbi Brown Eye Shadow in Saddle (£15.50) and she buys it from the brand's makeup counter at Peter Jones department store in London's Sloane Square. Staff there reportedly taught Kate how to apply the deep brown shadow with a slanted make-up brush to fill-in her "thinning" brows, giving the Duchess a step-by-step lesson right there on the shop floor. She also got advice on Eye Cream (£28), Corrector (£17) and Concealer (£23.50) to help tame dark shadows and lines, and bought a Lip Liner Pencil in Brownie Pink (£15), which she was advised to apply all over her lips as a base for her Lipstick in Sandwash Tulle (£18). What do you think of Kate's makeup?