Katie, 30, suffered severe burns in 2008 when she had sulphuric acid thrown over her while walking down the street. The attack was orchestrated by her ex-boyfriend and was one that shocked the nation.
Over the years, the inspirational star has undergone hundreds of operations on her injuries and last night she admitted she finally feels comfortable in her skin.
Taking to Instagram, Katie posted a photograph of herself in the clear, solid plastic pressure mask she had to wear in the aftermath of the attack.
The pressure from the mask, which covered the lower part of her face, helped to speed up the healing process and she was required to wear it for many hours every day and night.
Commenting on the picture, Katie told her followers: "When I look in the mirror my scars no longer upset me, they just remind me I am stronger than the person who tried to hurt.
"We all have scars, whether they are on the skin or the soul. Remember, only those who survive wear scars. Next time you look in the mirror repeat to yourself, 'I'm proud to be a survivor'."
Katie's ex-boyfriend Daniel Lynch was jailed for life for organising the attack, as was Stefan Sylvestre, who carried it out.
The star couldn't be admired any more for the way she has transformed her life since the horror.
Along with launching The Katie Piper Foundation, which supports burns victims, Katie has forged a successful TV career. Last night, the second episode of her successful documentary series Bodyshockers aired on Channel 4.
Last March, Katie became a mum for the first time to daughter Belle and, in December, she got engaged to her long-term boyfriend James.
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