All hail Terry de Gunzberg! Once the creative director at Yves Saint Laurent, Terry was responsible for the creation of such iconic products as the Touche Éclat and the Teint Singulier. In 2000 she ended her collaboration with YSL to focus on the development of her own make up brand: BY TERRY. The main focus of BY TERRY is radiant skin, so every foundation, tinted moisturiser and concealer will leave you with a fresh and dewy complexion – your skin will quite literally be infused with luminosity. I must confess that I have only ever tried the foundations so I…