Heart have pulled the plug on their European tour.
They released a statement saying, "In late May, Ann Wilson will undergo a time-sensitive but routine medical procedure for which the minimum recovery time is six weeks.
"Heart deeply regrets this unfortunate circumstance and hopes to return to Europe soon..."
Ann also posted her own statement saying, "I'm okay! Please don't worry. I do apologize for any inconvenience this may cause. It's certainly an inconvenience for me."
Heart last performed on Friday in Atlantic City, and the European tour was scheduled to start on June 20th in Belgium with Squeeze opening.
The next show is scheduled for July 30th in Cleveland at Progressive Field with Def Leppard and Journey.
Ann Wilson is 73.
Check out the original post here on Heart's official Instagram.