For some reason, in the world of fashion it's always a bit of a faux pas when you turn up wearing the same outfit as someone else. We're not exactly sure why, because surely this just proves you both have equally good taste, but that's just the way it is.
Still, three gals who couldn't care less about that and are all about breaking the rules are Selena Gomez, Gigi Hadid and Zendaya, who have instead been doing the twinning thing and have rocked the exact same dress three different ways.
The frock in question is a super sporty Louis Vuitton midi that patterned with an intense blue, green and white print.
Naturally all three ladies styled it totally differently, so let's check 'em all out shall we?
First up you better keep your eye out for Selena, who rocks the dress like nobody's business in the official Louis V campaign pics.
Styling it with a dark and sultry edge, she has beachy waves, a dark purple lip and heeled biker boots.
Then there's Zendaya, who wore the dress at the 2016 Louis Vuitton Resort Show over in Rio, and who went for a warm and summery look complete with the reddest of lips.
Wearing it over a patterned frothy skirt, she added a matching scarf to her bag to pull the look together.
Last up is the sportiest version of the look, worked by Gigi Hadid on her shiny new cover of American Vogue.
With a fierce Rapunzel style plait and white stiletto heels, it's a whole different interpretation of the look.
But which is your fave? Let us know with a tweet to @Sugarscape already.