From Rihanna's hand tattoo and Cara Delevingne's lion to Justin Bieber and Cheryl Cole (not the rose), BangBang is the tattooist behind, basically, all the best celeb tattoos you've seen over the past couple of years. Naturally, then, he's the person responsible for Delevingne and Dunn's matching D tattoos, unveiled this week, as well as the new inking that Rita Ora showed off on Instagram ('Yeah, I tattooed her last night. I did a ballerina, it's on the back of her arm.' #casual). Here are four things we learned when we grabbed him for an exclusive chat.