The girl who must eat every 15 minutes to Stay alive(PHOTOS)

Lizzie Velasquez weighsjust four stone and has almost zero per cent body fat but she is not anorexic.In fact, the 21-year-old from Austin, Texas, must eat every 15 minutes to stay healthy. Miss Velasquez has a rare condition which prevents her from gaining weight even though she eats up to 60 small meals a day.Despite consuming between 5,000 and 8,000 calories daily, the communications student, has never tipped over 4st 3lbs.”I weigh myself regularly and if I gain even one pound I get really excited,” said 5ft 2 ins Miss Velasquez, who wears size triple zero clothes.