The stars have been given the age progression treatment by US forensic artist Joe Mullins who shows us how the spunky lads might look a half century from now.
Who knows if these guys will still be singing pop ballads when they're pushing 70? But according to these pics they'll all still be rocking their 2012 hairstyles … even after they've gone grey!
Check out our slideshow to see what a spunky silver fox Justin Bieber is destined to become, and marvel at the weird hobbit face forecast for poor Niall Horan!
