Lisa Rinna: Makeup-Free on Instagram! >>Hollywood

Lisa Rinna is the latest celebrity to go makeup-free on Instagram.

The latest member of The Real Housewives of Beverly Hills cast went online yesterday and posted a a revealing, all-natural selfie, doing so as part of UNICEF's #wakeupcall campaign, which lends support and awareness to children displaced by the civil war in Syria

"I woke up like this' #UNICEF #WakeUpCall," the actress wrote as a caption.

Countless stars, from Demi Lovato to Bethenny Frankel to Kim Kardashian, have posted make-free selfies online over the years.

But others participating in this specific movement include Cindy Crawford (who posted a barefaced pictured to Instagram on Monday) and Rosie Huntington-Whiteley, who got in on the same act last week.

Veteran models Supermodels Naomi Campbell and Elle Macpherson have also contributed to the social media-fueled awareness effort.

We applaud each and every one of them and we look forward to seeing what sort of craziness Rinna will bring next season to The Real Housewives of Beverly Hills.

29 Celebrities With and Without Makeup

1. Kim Kardashian

Kim Kardashian's doesn't lie about the fact that makeup MAKES her who she is. She's shared more than o