Liz HurleyNot many topics are taboo in Celebville.

But age sure is one of them.

In a world where everyone can be as young as they feel, and possibly - thanks to fab make-up and a plastic revolution - as they look...

It just isn't good form to bring up the topic of age.

It's thought of as insensitive and more than a little bit crude.

But as hardened showbiz investigators, we can't help but yearn to pin the issue down.

There's just so much smoke and mirrors going on.

Take someone like Liz Hurley. She looks amazing and gives off this feel of endless youth and beauty, but it's yonks back since she dated Hugh Grant, and she can't be that young still, surely?

Time doesn't stand still, after all.

On the other end of the extreme, we've got peeps like Amy Winehouse, who've been through a huge amount of drama and action, yet when you stop to think how young they actually are, you're gobsmacked.

So join us as we go undercover in the mystery-making world of celebs, and pose the question: how old are they, really, truthfully, honestly? Click below to find out.