Less than 20 years ago, Sir John was working on a MAC counter in SoHo in New York City. Skip forward a bit and he’s working backstage at Milan Fashion Week with Pat McGrath, then Charlotte Tilbury introduces him to Beyoncé and the rest is history. Now, as well as being Beyoncé’s go-to make-up artist, he has a television show with Ashley Graham and travels the world with L’Oréal Paris as one of the brand’s celebrity make-up artists. Here, he shares his seven steps for a flawless base.