Researchers say we all have a "good side" of our face.

“Make sure you get my best side!” is a joke we’ve probably all made at some point while having our photo taken.

Yet for many of us, it’s not actually a joke at all. Next time you assemble for a group shot with your mates, or pose for a selfie, take note of how many people will adjust their position to ensure a certain angle of their face is captured. Or maybe you’re the one doing the adjusting.

Either way, there’s no denying the whole ‘best side’ gag is a little more legitimate than we’d like to think (hello — human faces are by nature asymmetrical). Now, research has found there’s one side of the face women overwhelmingly favour.

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In a survey of 1000 women, 16 per cent reported liking both sides of their face equally, while 43 per cent didn’t view one side as better than the other. How very diplomatic of them.

Among those who do play favourites with their facial contours, the majority said their right side was… well, the right side for photos. It was a close call, though; at 23 per cent, Team Right narrowly beat Team Left by five per cent.

However, research suggests all you right side-favourers (that includes you, Kylie Minogue) could have it completely wrong. Yep, maybe science knows your face better than you do.

Which celebrities lean ‘to the left, to the left’? And which ones have it Right? We stalked their Instagrams to find out. (Post continues after gallery)

A study published in the journal Experimental Brain Research concluded that humans find the left side of a face more aesthetically pleasing, because it’s more capable of showcasing emotions more actively and expressively.

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“Our results suggest that posers’ left cheeks tend to exhibit a greater intensity of emotion, which observers find more aesthetically pleasing,” the researchers explained.

Western artists have long known this — having favoured the left hand side of their subjects’ faces in portraiture — as has Ariana Grande. During her Australian tour last year, the pop star stipulated that photographers could only capture her left side. As you can imagine, our local media loved that.

If you haven't yet determined if you have a preferable side of the face, or you're just curious, there's an easy way to figure it out. According to the website LifeHacker, all you need is a piece of paper:

Fold a piece of paper vertically over one side of your face, then the other, says Ian Spanier, a photographer in New York City. Your better side is the one with more upturned features—for example, the corners of your eyes and lips.

Or perhaps you can take all of this research with a grain of salt and give kudos to both sides of your face. We think that might be the best option...

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Do you have a best side? Or do you think it's kinda mean to play favourites with your face?