The 'Confident' singer swapped the baggy jeans, oversized shirts and caps for a slick suit to attend the amfAR Cinema Against Aids 2014 Gala on Thursday night (22 May).
See? He can do dressy!
Of course, he didn't leave his cheeky side at home, striking a variety of rather interesting poses on the red carpet. Embracing his inner model, perhaps?! Either way, we reckon maybe he should have just stood still and smiled...
Justin was just one of many stars – including Nicole Scherzinger, Lewis Hamilton, Kylie Minogue, Tamara Ecclestone and Rosie Huntington-Whiteley – at the glitzy event.
After the event, the official amfAR account tweeted: "A new generation is ready to stand up and support. Thank you for joining us tonight, @justinbieber."
Justin's been making headlines ever since he arrived in Cannes earlier this week, thanks to strolls around the streets shirtless (as you do) and rumours he was getting all flirty with model Barbara Palvin, who was previously linked to Niall Horan.
But it seems he'd rather be left alone. Tweeting at paparazzi this week, he said: "Give me some space. I know I look fly but s**t."
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