The teenage superstar was spotted rocking his original 'do on the front row of the Y-3 show on Sunday (8 September), which has now got us reminiscing about his first years in the industry.
Back when Justin's debut single 'One Time' hit the airwaves in 2009, he became well known for his cute, side-swept hairstyle just as much as his singing.
In fact, his hair ended up becoming a signature look for the youngster and was hugely adored by his rapidly growing fanbase, until he decided to gel his hair into a quiff and wear caps a lot more.
But it seems the 19-year-old may have felt a little nostalgic yesterday, as he stepped out with the trademark floppy style, slightly swept over to one side.
Justin also wore a pair of leather trousers, some bright white trainers and a black and gold T-shirt that showed off his intricately designed tattoo sleeve, which includes his latest inking of a rose.
Of course, the Beliebers were beside themselves when they saw their idol with his original hairstyle at the weekend and the comments poured in.
Writing on Instagram, one fan exclaimed: "Hairflip is backkk. I love you", while another wrote: "You suit your hair so much like this ^.^"
We wonder whether this change will be permanent or whether he just ran out of hair gel.
What do you think of Justin's old style? Let us know in the comment box.
Remind yourself of Justin's original hairstyle by watching the video for 'One Time' below.