Carrie Underwood posted his makeup-free shot on Instagram during a workout with her husband, Mike Fisher, on July 9, 2015. She captioned it: "The couple that slays together...stays together! Working out is always better with a partner! #StayThePath"
Credit: Carrie Underwood/Instagram
A bare-faced Heidi Klum still looks beautiful in this makeup-free selfie, posted on Instagram on July 14, 2015. The model/TV host captioned it: "Good Morning."
Credit: Heidi Klum/Instagram
"Hot Pursuit" star Sofia Vergara put her best, and freshest, face forward for a poolside Instagram pic on June 21, 2015.
Credit: Sofia Vergara/Instagram
The "America's Next Top Model" host came completely clean about her pre-make appearance with a selfie she posted on Instagram on June 17, 2015.
Credit: Tyra Banks/Instagram
A fake photo of a Cindy Crawford bikini shoot made waves for supposedly showing the model's body, flaws and all. But plenty of celebs, including Crawford herself, love to share their bare selves - multiple times, even. The supermodel posted this makeup-free selfie on Oct. 27 2014 to raise awareness of child Syrian refugees.
Credit: Cindy Crawford/Twitter
The singer posted this selfie without comment, and without a drop of makeup, on Jan. 29, 2014.
The "Fame Monster" singer posted this untouched photo to her Instagram in February 2015, offering fans a glimpse at what she looks like underneath all those elaborate outfits and over-the-top makeup.
The caption read: "No happier me than waking up with the sunshine in my face after a night of writing songs. In my mind, I kept seeing all you monsters singing along. Smiling. I think the best part for me isn't only just the songwriting process, it's who we get to share it with when its all finished."
Credit: Lady Gaga/Instagram
Lopez posted this image with the hashtag #iwokeuplikethis on June 15, 2014. For Lopez, that means big earrings, but not a big makeup bag.
Credit: Jennifer Lopez/Instagram
This winter, Rihanna returned to Instagram after a six month hiatus, as @badgirlriri.
This February 2015 photo, simply captioned "Tuesday," showed fans what the Barbados native looks like, when her glamorous makeup and fashion is stripped away.
The singer shared this intimate photo, acne cream and all, on Instagram on Feb. 9, 2014.
The female rap phenom puzzled many fans when she began posting a series of naked shower selfies to her Instagram page last year.
The picture, however, gave us a chance to see what the normally makeup-obsessed singer looks like untouched.
Credit: Nicki Minaj/Instagram
The lifestyle guru posted this pic on World Water Day of last year.
Credit: Gwyneth Paltrow/Instagram
"Good night LA," the supermodel Instagrammed on Oct 27, 2014.
Credit: Heidi Klum/Instagram
"You know it's gonna be a good Sunday when ya weaves out & u haven't put ur face on yet," the teen posted on Jan. 11, 2015.
Credit: Kylie Jenner/Instagram
The singer has been lobbying for #NoMakeupMondays through photos like this one, from Feb. 16 2015.
Credit: Demi Lovato/Instagram
"90210" star AnnaLynne McCord often takes a stand against Hollywood's expectations of actresses by attending events without any makeup.
Here, she arrives at the Madden NFL 09 premiere party at STK in Los Angeles, California, August 7, 2008.
Credit: Charley Gallay/ Getty Images
The apparently barefaced actress caught a stage show in Australia on July 5, 2009.
Credit: Robert Prezioso/Getty Images
This is how supermodel Kate Moss stepped out to see the Glastonbury Music Festival in 2008.
Credit: Matt Cardy/Getty Images
The actress and producer used this May 29, 2014 Instagram photo to shill for her new beauty line ... but the only makeup she flaunted was nail polish.
Credit: Drew Barrymore/Instagram
Swinton is known for letting her face go naked on the red carpet. Her appearance at the Cannes Film Festival on May 25, 2013 was no exception.
Credit: Pascal Le Segretain/Getty Images
The actress posted this pic Feb. 17 2015, saying: "I don't know why I still look like a teenager sometimes..#Sky#nomakeup#thegoodolddays#"