Courteney Cox and Liv TylerCourteney Cox and Liv TylerThere's nothing more exciting than preparing yourself for a big night out... getting all frothed up about that fabulous new dress.

Frankly, you know you look hot.

That's exactly what Courtney Cox must have felt as she dolled herself up in a stunning midnight blue number.

But fast forward three days... she spotted pics of Liv Tyler wearing the identical frock to another Hollywood bash.

The irritation.

However, spare a thought for Liv... she probably bought (or lent) her frock and safely tucked it away in her wardrobe for the big night.

Then three days before... she sees snaps of Courtney in her frock.

The mortification.

Panic sets in - does she rush out and purchase another or just brave it and add an accessory or two?

She did the latter - and so have many, many other stars in the same situation.

We've gathered the inadvertent copycats in the gallery above.

Who do you reckon wears it better?