The Poker Face star claims the illness could have damaged her voice...
Lady GaGa has revealed all about her battle with eating disorder bulimia, stating she used to make herself sick in a bid to look like "a skinny ballerina."
Speaking of her illness at a young women's conference hosted by Arnold Schwarzenegger's estranged wife Maria Shriver, GaGa divulged details of how she used to "purge" so much that it almost hindered her singing career.
The 25-year old explained: "It's easier for me to talk about it now because I don't do it anymore. I used to throw up all the time in high school.
"Bulimia made my voice bad so I had to stop. The acid on your vocal cords it's very bad. But for those of you who don't sing, you maybe don't have that excuse until it's too late. It's very dangerous."
The Marry The Night singer went on to confess that she forced herself to throw up after eating her father Joe's favourite dinner - pasta and meatballs: "I wanted to be a skinny little ballerina but I was a voluptuous little Italian girl whose dad had meatballs on the table every night.
"I used to come home and say, 'Dad, why do you always give us this food? I need to be thin'. And he'd say, 'Eat your spaghetti'."
GaGa then criticised magazines and music video makers for altering her body, stating: "Every video I'm in, every magazine cover, they stretch you, they make you perfect. It's not real life."
The Bad Romance hitmaker added: "I'm gonna say this about girls. The dieting wars have got to stop. Everyone just knock it off! Because at the end of the day, it's affecting kids your age. And it's making girls sick.
"It's really hard. But you've got to talk to somebody about it. I'm encouraging you to know what you're worth."
GaGa concluded: "And know that no matter who has more money in class, who has more stuff, who has a country house nobody is worth more than anybody else."
Earlier this week, the eccentric songstress announced the first dates as part of her epic 110 date Born This Way Ball tour - which kicks off in South Korea on 27th April.