Yesterday, Lady Gaga posted up a rare make-up free selfie onto her Instagram page, simply captioned with the words "Day off sleepy girl".

While the Poker Face singer regularly shares pictures of her done up, in her more typically glamourous style, the new image shows her completely stripped back.

Back in March, the no make-up selfie went viral as part of a campaign to raise money for Cancer Research UK.

The trend became hugely popular on social media, such as Twitter, Facebook and Instagram, with members of the public posting up photos of themselves without a scrap of make-up on, and then tagging their friends to do the same, and then donating money for the cause, by texting BEAT to 70007.

Not to feel outdone by the ladies, hundreds of men got creative with beauty products and posting the results online with the hashtag #fullmakeupselfie and #manupandmakeup, for various charities too, such as raising awareness and money for prostate cancer research.

However, the bare, "unglamourous" (they still look incredible), selfie shot has been doing the rounds with celebrities for ages, including Holly Willoughby who posted a shot of her looking fresh faced one morning, just under a year ago.

Others who have been brave enough to expose themselves without any face paint, include Beyoncé, Gwyneth Paltrow, Lupita Nyong'o, Jessica Simpson and Rosie Huntington-Whiteley.

Heidi Klum posed au naturel back in 2012 for BBC Children In Need's first-ever "BearFaced Day" campaign, which was to raise money for disadvantaged children in the UK.

cancerresearchuk.org