Like libraries for bookworms, beauty counters for glam addicts are a valuable resource. Not only one-stop shops for all your must-haves, they're a mecca for makeup education. Seriously. We snooped ...

In other words, Mary knows all there is to know about achieving flawless — and timeless — makeup so when I was invited along to watch her do her thing at a makeup masterclass with L’Oréal Paris ...