So what is the magic formula? Rousteing regularly posts pictures of himself enjoying nights out (and nights in) with his glamorous posse of famous friends - including Naomi Campbell, Kim Kardashian West, Rosie Huntington-Whiteley, Rihanna and Karlie Kloss to mention a few - and gives his loyal following an exclusive insight into his private life and childhood. J
He is also not afraid to parody himself, which has proven time and time again to endear even the harshest of critics. On learning that he had hit the one-million-followers mark, Rousteing posted a still of himself on a chat show, with a contented grin on his face, accompanied with the caption: "The face that I do when I realise I reached 1M followers #Myfollowersarebetterthandyours #BalmainArmy #thankU #loveU #itsallaboutLOve #dreamteam #colgate".
When asked about his success on the social-media platform, Rousteing had a firm grasp of what his secret is: "I'm young, I'm black, I'm a designer, I have famous friends, but I also eat hamburgers and have both feet on the ground. It's real life and reality always excites people," he told WWD.