WATCH: Lady cruelly dubbed 'world's ugliest woman' beats bullies in the most heroic way

THIS woman was repeatedly told to "kill herself" by online trolls because of the way she looks – what she did next will bring a tear to your eye.

Lizzie Velasquez was just 17 when she discovered a YouTube video naming her the "world's ugliest woman” – watched by millions of people across the globe.

Users cruelly branded her a “monster”, said she should “shoot herself” and one troll even wrote “kill it with fire”.

The brave 27-year-old from Texas suffers from an undiagnosed condition that's so rare only two other people in the world have it.

She can’t put on any weight and is completely blind in one eye and partially blind in the other.

Lizzie has never weighed more than 4.5st – though she consumes at least 5,000 calories every day.

But she didn't let the bullies beat her. Instead the inspiring lady became a motivational speaker who now has more than half a million subscribers on her own YouTube channel.

It was when she delivered a moving TED talk in Austin, Texas back in 2013 that Lizzie changed both her life and the lives of others forever.

INSPIRATION: Lizzie Velasquez's bravely overcame horrible online abuse

Lizzie’s speech, called “How Do You Define Yourself?”, was made up on the spot and it went into detail about cyberbullying and the obstacles she’s faced in life.

It was so moving that the mum-of-one became a star and was even made the subject of a film called "The Lizzie Project”.

Director Sara Hirsch said: "Her experience of triumphing adversity and making it to the other side of a painful experience is universal.

"As soon as Lizzie became more open and honest – whether it was her TED talk or her YouTube videos – it was clear that people were thirsty for a story where somebody stands up and says I'm not going to be a victim, I'm going to make a change."