Stage names can be a funny thing: those musicians and celebrities that we've always known by their glitzy showbiz title are often referred to as 'Bob' or 'Liz' by their family and friends – but for various reasons they've had to adopt a more 'memorable' moniker.

So, let's test your knowledge on this. Grab a friend and see how well you both fare on naming the celebrity by their birth name.

As always – sure, it wouldn't be an quiz if we didn't – we've thrown a few tricky ones into the mix, although there's nothing too obscure. We're not that cruel.

Can you get 20/20? Leave a comment with your score!

No cheating, and good luck!