Selena Gomez is taking a stand against online body shamers who criticized her appearance at the premiere of Emilia Pérez at the American French Film Festival in Los Angeles. Gomez stars alongside Zoë Saldaña in the forthcoming Spanish-language musical, which will debut on Netflix on November 13.

Selena Gomez has hit back at internet trolls who have body-shamed her, resulting in her speaking about her struggles with small intestinal bacterial overgrowth.On October 29, the Only Murders in the Building star attended the debut of her new movie Emilia Perez at the DGA Theater Complex in Los Angeles.

SIBO stands for small intestinal bacterial overgrowth. It happens when there’s an unusual increase in the overall population of bacteria in your small intestine, particularly types of bacteria that aren’t normally found in that area of your GI tract, per the Mayo Clinic.