October 03, 2014 - 12:22 BST hellomagazine.com Justin Bieber has revealed that he is working with Karl Lagerfeld on 'big things'. Justin Bieber has revealed he is working on 'big things' with iconic fashion designer Karl Lagerfeld. The 20-year-old singer shared a photo montage with his 22million fans on Instagram of himself posing with Chanel's creative director. 'Big things are coming with my friend @KarlLagerfeld,' he captioned the image. Justin Bieber shared a photo montage of him and Karl Lagerfeld on Instagram The photo montage includes two black and white screenshots of Justin posing topless for the camera, showcasing some of his famous tattoos. Other photos include one of the young Canadian sitting at a table with Karl, and another black and white image of the pair posing for the camera together. Whether Justin is modelling for one of the labels for which Karl is the creative director, or whether he is simply the subject of one of Karl's renowned photography projects, the reason for the collaboration has yet to be revealed. Justin and Karl were spotted taking a selfie at the CR book launch event It's not the first time that the pair have been spotted together, as they both attended the launch of Carine Roitfeld's new book at Paris Fashion Week in September. Justin shared a selfie of himself with Karl on Instagram at the glitzy party, which saw a high fashion guestlist with the likes of Kim Kardashian, Olivia Palermo, Kendall Jenner and Cara Delevingne attending.