Lisa Rinna Makeup-Free Selfie: 'RHOBH' Star Goes All Natural On Social Media [VIDEO]

Lisa Rinna recently shared a photo of herself without makeup.

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This week on Twitter, the makeup-free selfie trend took center stage, and on Tuesday, the newest addition to Bravo's The Real Housewives of Beverly Hills got in on the action.

"Lisa Rinna took to Instagram on Tuesday with a revealing makeup-free photo," E! News reported on Wednesday, Oct. 29. "Rinna joins a long line of celebrities who have contributed morning selfies to UNICEF's #wakeupcall campaign, which lends support and awareness to children displaced by the civil war in Syria."

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Rinna was added to the cast of The Real Housewives of Beverly Hills earlier this year, following the exits of season four stars Joyce Giraud and Carlton Gebbia. Also brought aboard for season five was Rinna's fellow soap actress, Eileen Davidson.

Along with the Instagram selfie, Rinna shared a lyric to Beyonce's hit song, "Flawless," which read, "‘I woke up like this' #UNICEF #WakeUpCall."

Other celebrities who have participated in this week's makeup-free selfie craze include Cindy Crawford, who shared an all natural photo on Instagram on Monday, Rosie Huntington-Whiteley, Naomi Campbell and Elle Macpherson.

Lisa Rinna will make her Real Housewives of Beverly Hills debut later this year on Bravo. Joining her for season five are returning housewives, Brandi Glanville, Kim and Kyle Richards, Lisa Vanderpump and Yolanda Foster. Former stars Adrienne Maloof, Camille Grammer and Taylor Armstrong will also be appearing on the show in recurring roles.