She wrote: "Brit Barbie. This might be my favorite makeup from the whole tour. Margot Robbie IS a dream face to paint on." One of her go-to foundations was the Chanel Les Beiges Healthy Glow ...

but A-listers like Jennifer Aniston and Margot Robbie have previously sung its praises. Make-up artist Pauline Briscoe also revealed that it was part of Oti Mabuse's prep for the recent BRIT Awards.

And while celebs' beauty routines often stay under wraps, there'e one face tool that we know has been used on plenty of famous faces in recent years: the ZIIP Halo Microcurrent Facial Device.

Like no one else—that's what Margot Robbie's like. You're asked this question ... Leonardo DiCaprio a thunderclap of a slap on the face, an improvisation that stunned us all.

Gilbert Flores/Deadline via Getty; Mattel, Inc There's no denying that Margot Robbie — and her stylist Andrew Mukamal — are completely devoted to the Barbie bit, making fans all over the world ...