Demi Lovato wants her fans to know that they’re “beautiful,” regardless of what society tells them.

The singer, 25, tweeted a body-positive message to her fans while slamming modern culture’s obsession with dieting.

“It’s so frustrating and sad how strong the #dietculture in our society is,” Lovato wrote. “It’s constantly telling us we’re not thin enough no matter what.”

In reality, she added, “You are beautiful no matter what anyone says.”

Lovato also retweeted a post from Eating Disorder Hope about the correlation between orthorexia and perfectionism.

Lovato, who has a history of eating disorders, said in January that she has “given up dieting” and the “chronic stress” of worrying about every single thing she eats.

“I stopped dieting and have gained a little weight so it’s been a struggle, but at the same time, I’m happier because I’m not restricting myself from certain foods and I’m no longer food shaming myself,” Lovato told PEOPLE.

And she emphasized that being healthy is more important than trying to lose weight.

“As someone recovering from a food disorder, it’s something that I want to put out there that you don’t have to diet in order to be happy,” Lovato said. “I don’t think I’ve heard that message out there in the public and of course, it’s important to be healthy and everything in moderation is fine.”