Teenage heart-throbs of the '70s and '80s: This is what they look like now ...

Before there was Bieber there was Donny Osmond, and before there was Hanson, there was Henry Winkler.

And although the decades and generations may differ, all our teenage years can be defined by the dreamboat who adorned our bedroom walls.

But what happens when the fans move on?

Prepare yourselves, here are our teenage heart-throbs as they were then, and where they are now ...