See Drew Barrymore and More Stars Who’ve Shared Makeup Free Selfies!

No makeup, no problem!

This week, Drew Barrymore took to her Instagram page to post a makeup free selfie in honor of her 40th birthday — and she isn't the first star to strip down in front of the camera!

Click through the gallery above to see 16 celebrities — including Ellen DeGeneres, Gwyneth Paltrow, Cameron Diaz, Oprah and more! — who dared to bare it all on social media.