What do Mick Jagger, John Mayer, Zac Efron, and Justin Bieber all have in common? Besides a set of pipes and a combined net worth high enough to fill Brad Pitt and Angelina Jolie's Château Estate in France with all the rosé and olive oil, they also happen to be super beauty fans.
And there's more where that came from. That's right, this impending list of unsuspecting actors, musicians, and Hollywood stars are also low-key skin-care aficionados. Curious yet? Click through the slides ahead to find out exactly who they are, what they love, and why in the hell they don't have a beauty contract yet.