The Insider.com

Revlon Global Brand Ambassadors Emma Stone and Olivia Wilde participated in the 15th Annual EIF Revlon Run/Walk in NYC on Saturday to raise money and awareness for women's cancer research, counseling and outreach programs, where the two showed off as natural a look as you're probably ever going to get from the always glammed--up duo.

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Olivia Wilde looked the more makeup-free of the two, sporting a little bit of eye shadow and mascara, but not much else. Emma Stone wore some obvious lip gloss, most likely Revlon's ColorBurst Lip Butter she endorses, which makes sense given Olivia reps Revlon's ColorStay 16 Hour Eye Shadow.

Related: Emma & Olivia's Revlon Ads Revealed!

... What kind of brand ambassadors would they be without using their own products?!

Related: Olivia Wilde -- 'My Face Can Go Tranny Real Fast'

But while the two looked predictably pretty and fresh-faced at the event, what is going on with Olivia's overly arched eyebrows?

Step away from the tweezers Olivia!