Katie Piper has been praised for getting involved in the Instagram "10-year challenge" by posting a picture of herself when she was recovering from her acid attack.
Madonna, Ryan Seacrest, Jack Whitehall and Caitlyn Jenner are just some of the celebrities who have put their photos on the social media platform to show how they have changed – or not.
The post by TV presents and shapes model Piper is among the most poignant ones, and has hit home with many people.
It shows here aged 25 and wearing a mask to heal the scars, not long after her boyfriend got someone to throw acid in her face in March 2008.
Piper posted "Don't let this challenge create anxiety within you about aging- it's an absolute privilege. 1st pic me age 25 year of 2009 in my mums kitchen. 2nd Pic is me age 35 last week in my own kitchen 2019! #Lifeisprecious #health #humanbodyisamazing ".
More than 80,000 people liked the post in the first 15 hours since it went up.
People have replied that Piper is an "inspiration" and "amazing".
"Your story is just amazing and you are always so positive. Beautiful lady inside and out," posted sallymorgs
"What can i say but you are amazing katie such an inspirational woman x," said another Instagram user.
Many Hollywood celebrities also have to face the 10-year challenge.
Caitlyn Jenner posted a picture from 10 years ago, when she was a man. "Now THAT is a # 10YearChallenge Be authentic to yourself," she posted.
Ryan Seacrest, who looked liked he had hardly aged.
"When time and hair product are on your site (swipe right)," he wrote.
Singer Janet Jackson posted pictures in which she looks a little more fresh-faced in one, while actress Amy Schumer looked unrecognizable – mainly because she posted a picture of actress Charlize Theron in the movie Monster.
British actor and comedian Jack Whitehall looked far more groomed and styled in his more recent picture.
He thanked his "stylist, my hairdresser and the person that told me to close my mouth" for his updated, suave appearance.