WOW, how they’ve changed! Justin Timberlake, Kylie Jenner & more celebs aged 15 – and how they look now…

We look back at some of our favourite celebs in their teenage years - and how much they've come on since!Since we posted a #throwback video of a 15-year-old Justin Bieber singing Where Are You Now, we’ve not been able to stop watching it on a loop. He’s just so young. 15 years young!
And, when you compare the shiny-haired slip of a lad that appears in the video to the Biebs we’ve come to know and love (and sometimes, just sometimes, despair of) in recent years, the di