Bono (real name: Paul Hewson) sustained an injury while preparing for the next leg of U2's 360-Degree tour. The 50-year-old Grammy winner is expected to remain hospitalized for the new few days.
Because of the operation, U2 has postponed their June 3 concert in Salt Lake City, Utah. It's unknown whether more dates will be canceled.
"We hope to get things resolved as soon as possible," said Paul McGuinness, U2 band manager.