American rock band Heart, comprised of sister-duo Ann and Nancy Wilson, has canceled its upcoming tour dates in Europe due to Ann undergoing a "time-sensitive but routine medical procedure" in late May,

The band had to cancel several of its tour dates so that the lead singer can recover from a “time-sensitive but routine medical procedure.”

They continue, "Heart deeply regrets this unfortunate circumstance and hopes to return to Europe soon. Refunds will be available at point of purchase where applicable." Ann Wilson also shared Heart's post on her own social media,

Ann Wilson, determined to reassure fans and prevent the spread of rumors, personally addressed the situation on her own social media platforms. "I'm okay! Please don't worry. I do apologize for any inconvenience this may cause.

American rock band Heart have been forced to cancel their European tour (Picture: Getty) An iconic American rock group who first found fame in the 1970s before a second wave of success in the 1980s have had to abruptly cancel their highly anticipated European tour.