Yesterday, a controversial tweet joking about eating disorders from Lady Gaga -- the most popular celebrity on Twitter, with over 22 million followers -- gave rise to a slew of angry responses. Gaga wrote:

It was a surprising statement from Gaga, who has publicly opened up about her struggle with bulimia and urged young women to cultivate healthy body image. During an appearance at a young women's conference in Los Angeles in February, the singer admitted that she was bulimic in high school, and said that she was obsessed with being a "skinny little ballerina."

In response to the tweet, the National Eating Disorder Association staff Twitter account wrote: "Huh? This is the same person who recently implored girls to stop dieting?"

Some of Gaga's fans defended the tweet, saying that it was just a joke and was intended to be ironic. However, the responses were largely negative. For example, one of Gaga's followers tweeted:

Miley Cyrus has also taken to Twitter recently to address eating disorders -- but in this case, she was refuting rumors that she might have a problem. She wrote, "For everyone calling me anorexic I have a gluten and lactose allergy. It's not about weight it's about health." In another tweet, she encouraged her fans to go gluten-free for a week. And although many people enjoy good health on a gluten-free diet, it isn't right for everyone -- and critics have questioned Cyrus's decision to dispense health advice to her fans.