Heart singer Ann Wilson on Tuesday told fans she has cancer, and the band is postponing the remaining concerts on its Royal Flush Tour.

The 74-year-old singer shared the update on social media. “I recently underwent an operation to remove something that, as it turns out, was cancerous,” Wilson shared with her Instagram followers. 

“The operation was successful and I’m feeling great, but my doctors are now advising me to undergo a course of preventive chemotherapy and I’ve decided to do it,” the post continued.

The Heart singer also noted that her doctors told her to “take the rest of the year away from the stage in order to fully recover.”

“To the ticket buyers, I really do wish we could do these gigs. Please know that I absolutely do plan to be back on stage in 2025,” Wilson wrote. She continued by thanking her fans for their continuing support, then concluded by writing, “This is merely a pause. I’ve much more to sing.”

Wilson noted that she wouldn’t be commenting more publicly on the matter.

The rock band Heart formed in 1973 in British Columbia and is best known for commercial hits like “Magic Man,” “Crazy on You,” “Barracuda,” and “Alone.” Heart has been nominated for four Grammy Awards and has sold more than 50 million records worldwide, with about half of those sales coming from the United States.

Wilson was also named one of the “Greatest Heavy Metal Vocalists of All Time” by a rock industry publication in 2006.

A statement shared on Heart’s official Instagram page said of the tour postponement, “More information to be announced in the coming weeks.”

This announcement came several weeks after Wilson and her sister, Nancy, who is also a member of the band, announced that several of the June and July concerts in Europe were being canceled due to health reasons.

The two bandmates said at the time that Wilson would use the time to “undergo a time-sensitive but routine medical procedure” and would have at least six weeks of recovery, according to a report from People magazine.