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Check out the stars who've gone through a SERIOUS metamorphosis over the years - hitting that gym, eating their chicken and broccoli and packing on a HELLUVA lot of muscle to complete their transformations.
The 'Stitches' star keeps fans up-to-date on his guns via Instagram and we can pretty much ALL agree this is a very good thing. Picture: Instagram
The Neighbours and Dirty Grandpa star has become as well known for his acting talents as he is for whipping his top off at EVERY opportunity. And when you're as ripped as Zac is...
Yes that really IS Harry Potter star Matthew Lewis showing off some pretty damned impressive abs. Can you believe he used to play geeky but loveable Neville Longbottom? Picture: Getty / Joseph Sinclair
The teen model is also REALLY not show about showing off his ever-improving bod to his fans. Picture: Getty | Instagram
He was always the cute little slim chap from The Vamps, but no longer! Connor has been beefing up and he's now, basically, buff as HELL! No complaints here...
Liam started off in 1D looking pretty slim but in recent years he's been at the crunches... giving him a rock-hard stomach for the #Directioners to swoon over. Picture: Twitter/Instagram
He might have been the cute Jonas Brother everyone wanted to be pals with but since those early days Nick's been squatting, lifting and crunching his way to one of the BEST bodies in pop. Picture: Splash / Instagram
Since coming runner-up on the show Ray's gone through one of the most EXTREME transformations. We're actually a little scared. No,m seriously! Picture: Getty / Instagram
Our Biebs takes a LOT of pride in his appearance and as we all know - he isn't afraid to show off that hardwork in countless selfies! Picture: PA / Calvin Klein
Taylor Lautner famously beefed up for his role in Twilight: New Moon and since then he's kept up his muscular body leading him to Hollywood stardom. Picture: PA / Twilight
He's now VERY into his fitness and pretty much shocked the world when he bared (almost) all for his Armani campaign. We'll NEVER tired of seeing this shoot. Picture: PA / Armani
Back in McFly's early days Harry was the quiet, shy drummer people often forgot about. But a healthy amount of time in the gym and some reality show appearances soon changed that. Now Harry is LITERALLY hot stuff. Picture: Getty / Now TV/ Fever PR
From his cutesy blonde early days Cody's managed to transform his image into a super hot surfer-type music star and we've got NO complaints about it. Picture: PA / Instagram
Seriously, this guy is RIPPED! Picture: PA / Instagram
Now Adam's all zen and fitness loving and we wouldn't have it any other way TBH. Picture: Getty
'Mmmm Yeah'... we're definitely impressed, Austin! Picture: Getty / Instagram