FILe - In this April 7, 2017 file photo, John Mayer performs in concert during his "The Search for Everything Tour" in Philadelphia. Mayer has been hospitalized for an emergency appendectomy. The Grammy-winning musician was admitted to the hospital on Tuesday, Dec. 5, according to a rep. The singer-guitarist was due to perform later that night at a concert with the Dead & Company, but that date has now been postponed. (Photo by Owen Sweeney/Invision/AP, File)
FILe - In this April 7, 2017 file photo, John Mayer performs in concert during his "The Search for Everything Tour" in Philadelphia. Mayer has been hospitalized for an emergency appendectomy. The Grammy-winning musician was admitted to the hospital on Tuesday, Dec. 5, according to a rep. The singer-guitarist was due to perform later that night at a concert with the Dead & Company, but that date has now been postponed. (Photo by Owen Sweeney/Invision/AP, File) Owen Sweeney Owen Sweeney/Invision/AP
FILe - In this April 7, 2017 file photo, John Mayer performs in concert during his "The Search for Everything Tour" in Philadelphia. Mayer has been hospitalized for an emergency appendectomy. The Grammy-winning musician was admitted to the hospital on Tuesday, Dec. 5, according to a rep. The singer-guitarist was due to perform later that night at a concert with the Dead & Company, but that date has now been postponed. (Photo by Owen Sweeney/Invision/AP, File) Owen Sweeney Owen Sweeney/Invision/AP