Beauty journalist Laura Capon has been spilling all kinds of beauty secrets onTikToklately.

Now she’s disclosing Hollywood’s favorite foundation.

In thisTikTokvideo, Capon explained that she sees this foundation everywhere backstage at Fashion Week.

A woman posing at Fashion Week

But just what is this foundation?

As it turns out, it’s MAC’s Studio Face and Body Foundation.

A bottle of MAC Face and Body Foundation