If you plan to attend a Madonna concert and be within close proximity of the stage, make sure your smoking habit is in check. 

The 54-year-old music legend has long been known for making diet and exercise a priority — and on Wednesday, she verbally chastised fans present during a sound check in Santiago, Chile, for putting her health in jeopardy. 

"There are people smoking right now," the singer said, stopping halfway through the song "Human Nature" to observe those around her. "No smoking. If you're going to smoke cigarettes, I'm not doing a show. You don't care about me, I don't care about you. All right? Are we going to play that game? I'm not kidding. I can't sing if you smoke." 

"Entiendes?" she asked the Spanish-speaking crowd. "You're looking right at me and smoking cigarettes, like I'm a stupid f---ing idiot," Madonna said, then stormed off the stage.

This isn't the first time Madonna has publicly decried smoking. Back in April, she expressed disappointment after her 15-year-old daughter Lourdes was photographed smoking a cigarette. 

"I think I need to be maybe tougher," she told Brian Williams. "It's hard — every day is a negotiation. But cigarette smoking I'm not very fond of — for anyone. I don't approve of anyone smoking cigarettes, most of all my daughter."

Check out Madonna's concert cigarette smack-down below.

Michael d'Estries ( @michaeldestries ) covers science, technology, art, and the beautiful, unusual corners of our incredible world.

Madonna sends strong anti-smoking message to fans
Singer admonishes fans for smoking during a sound check for a concert in Santiago, Chile.