Charles Krupa/AP Photo

Lady Gaga was likely joking when she tweeted on Tuesday about eating a salad while secretly craving a cheeseburger, and added the hashtag " #PopSingersDontEat."  But now, the singer, who's famous for preaching a message of self-acceptance, finds herself under fire for making that comment.

Many fans reacted negatively to Gaga's hashtag.  One wrote, "Why would you even promote a message like that? Disgusting that you'd joke about such a serious illness."  Another added, "I can't tell if you're being sarcastic or not, but if not… Wow, that's an awful example you're setting."  Yet another wrote, "what a terrible example your setting miss gaga, RT if you regret saying that!"

There was so much reaction to Gaga's comment that the National Eating Disorder Association even took notice, posting on its Twitter account, "Huh? This is the same person who recently implored girls to stop dieting?"  Indeed, at a conference held in February at a California school, Gaga confessed to being bulimic in high school, and told the teen audience, "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."

While some have pointed out that Gaga has expressed the "pop singers don't eat" idea before in a past interview, others say that Gaga's frequent tweets about getting drunk probably set a worse example and nobody seems to be getting upset about those.