The 6 most important haircuts in the history of Pop

Guys, The Weekend's back with a new single, Starboy, where he's teamed up with legends Daft Punk.

But his funky new track is somewhat overshadowed by his all-new hair cut. Yep, he went and lopped it all off...

WE KNOW, RIGHT? Why would he snip those lovely locks off? But to be fair, his new style does look pretty cool, which is a relief.

Which got us thinking... which other massive pop stars dramatically altered their hairdos, and did it bring them success?

Remember the time Hannah Montana chopped her long hair off and dyed it bleach blonde? Of course you do! It happened not long before Miley released We Can't Stop, which propelled her career to even greater heights. Like, ahem, that Wrecking Ball vid.

We're not convinced blonde dreadlocks on Canadian pop prince Biebs was a great idea, but fans went bonkers when he revealed it. He snipped 'em off shortly after but the internet never forgets.

Since RiRi showcased her new bob in the video for Umbrella she's never looked back. It's safe to say the hair (and of course the amazing song she collaborated on with Jay-Z) worked, sending her into the stratosphere of the music world.

When one quarter of One Direction Harry Styles decided to chop off his long hair it almost sent the world into meltdown. But he did it for the Little Princess Trust: a charity that provides real hair wigs for kids who have lost theirs.

Brit singer Jessie J has shaved her head a few times now; the latest coming at the end of 2015. She'd previously done it for Comic Relief and raised about half-a-million pounds. That time it WAS about the money, money, money...