New 'do: Justin Bieber on September 8. (Getty Images)
Justin Bieber debuted a new hairstyle over the weekend — and it's totally retro. To the delight of tween girls everywhere, the "Boyfriend" singer has brought back his signature hair flip.
The 19-year-old sported the throwback look which helped make him famous on Sunday during New York Fashion Week. Seated front row at the Y-3 runway show, Bieber had on a black shirt and leather drop-crotch pants with white hightop sneakers. For most of the show he wore a hat, but when he first sat down he left it off, revealing his hairstyle.
[Related: 19 of Justin Bieber's Most Ridiculous Looks]
While it's fun to see his old style — which his young fans were, well, flipping over on Instagram ("THE FLIP !!! OMG," wrote _steph_0126) — there was something very new about his overall look, too. He was sporting a mustache!
Old look: Bieber, shown here earlier this month, was rocking a messier style. (Instagram)
[Related: Celebs at New York Fashion Week Fall 2013]
That said, in 2010 he was so follically challenged that he drew on a fake 'stache on with a pen. So, all things considered, he's come a long way.
Are you glad Bieber brought back the flip? And what about his new 'stache? Weigh in below.
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