Kelsea Ballerini is letting her fans know that she won't put up with any disrespect during her shows.

The incident that prompted this response happened during her headlining set in Sydney on December 6. Kelsea was performing her song "Penthouse," which she wrote in the aftermath of her divorce from Australian singer Morgan Evans. Someone in the crowd yelled out "Team Morgan!" Kelsea told them to "f--- off," rolled her eyes, threw a thumbs up to the crowd before giving the middle finger with a smile on her face. After the show, Kelsea took to Instagram to comment on the incident. "Respectfully, if anyone yells anything disrespectful to anyone during this song again, it will no longer be on the setlist," she wrote. "Please let this be a song that matters to people and not a place to insert yourself into a world that doesn't exist and was never yours to begin with. Team everyone's happy or bust please."