We knew this was coming!

After Lady Gaga had a "vomit painter" puke on her during a concert at the SXSW music festival, Demi Lovato took to her Twitter to slam the pop star for promoting bulimia.

Demi wrote, "Sad. As if we didn't have enough people glamorizing eating disorders already. Bottom line, it's not 'cool' or 'artsy' at all. Would you let someone bring a needle and shoot up on you. Addiction is addiction."

Lovato added:
    "All I'm saying is, artists in pop culture have influence on people. Young people who are struggling to figure out their identities are seriously influenced by the things they see their idols do. Whether we intend to or not, artists influence people of ALL ages and unfortunately what people see, people do. Hair, clothes and sometimes misinterpreting things, therefore using the excuse of art to engage in self-destructive behaviors. I've been through a sh*t ton.. More than any of you know. People emulate what they see celebrities do or let happen. And that's why I had to say something.. to let the people who don't understand the art in it, that bulimia isn't cool, and it won't get you on stage with your favorite artist."

Lovato entered rehab in October 2010 to seek treatment for "physical and emotional issues," and she's since been very public about her struggles with eating disorders, cutting and drug use. And this isn't the first time she's done this -- back in 2011 Lovato went after Disney for making a joke on the TV show Shake It Up. "I find it really funny how a company can lose one of their actress' from the pressures of an EATING DISORDER and yet still make joke about that very disease. #nice," she said at the time.

Still, Demi doesn't want to totally diss Gaga. "No hate, no shade, just love," she concluded. "You're SO talented, if not one of the most talented in our industry PERIOD. Dope is INCREDIBLE.. but you don't have to do that. Ps. I'm still a little monster myself."