How did the beautiful Margot, Angie, and J-Lo REALLY fare?

It’s the app that has absorbed millions since launching and going viral last week – calculates your age based on your facial structure and features.

Microsoft has now revealed that 33m people have used the software so far, collectively offering up 240m pictures for analysis.

Branded the ultimate vanity device, the outcomes have occasionally proved controversial. Indeed, users have been taking to social media in drones to share their delight and dismay at the results.

“Sorry if we didn’t quite get the age and gender right,” Microsoft offers by way of a disclaimer, “we are still improving this feature.”

But what about preened and groomed celebrities? With access to the best stylists, dieticians, cosmetics, and beauty treatments that money can buy, surely they look years younger than the Average Joe and Jane.

Not always so, it seems. Here at SHEmazing! we put some of our favourite famous faces through the app – with sometimes surprising results.

The stars the How Old app reckons look older:

Clockwise: Kylie Jenner is still just 17, and Lindsay Lohan is actually 28; 
22-year-old Selena Gomez, and Margot Robbie, who is 24


And the ones that have been deemed to look younger:

Clockwise: Demi Moore is incredibly 52; Victoria Beckham is actually 41;
Halle Berry has already marked her 48th birthday, and Jennifer Lopez is 45


Finally, the celebrities How Old got (pretty much) spot on:

Clockwise: Duchess Kate is indeed 33; Angelina Jolie is 39;
Michelle Keegan is 27, and Laura Whitmore has just turned 30