FILE - The rock group Heart, from left, Steve Fossen, Nancy Wilson, Michael Derosier, Ann Wilson and Howard Leese pose in Los Angeles on Feb. 19, 1980. Ann Wilson says she has cancer. The band is postponing the remaining shows on its Royal Flush Tour. (AP Photo, File)

FILE - Nancy Wilson, left, and her sister Ann, of the band Heart, perform during "An Evening with Heart" at the Grammy Museum in Los Angeles on May 24, 2010. Ann Wilson says she has cancer. The band is postponing the remaining shows on its Royal Flush Tour. (AP Photo/Chris Pizzello, File)

FILE -Ann Wilson, of Heart, performs at RFK Stadium in Washington on July 4, 2015. Wilson says she has cancer. The band is postponing the remaining shows on its Royal Flush Tour. (Photo by Nick Wass/Invision/AP, File)

FILE - Nancy Wilson, left, and Ann Wilson, of the band Heart, perform as the band is inducted into the Rock and Roll Hall of Fame during the Rock and Roll Hall of Fame Induction Ceremony in Los Angeles on April 18, 2013. Ann Wilson says she has cancer. The band is postponing the remaining shows on its Royal Flush Tour. (Photo by Danny Moloshok/Invision/AP, File)

FILE - Nancy Wilson, left, and Ann Wilson, of the band Heart, attend the premiere of HBO's "Foo Fighters Sonic Highway" on Oct. 14, 2014, In New York. Ann Wilson says she has cancer. The band is postponing the remaining shows on its Royal Flush Tour. (Photo by Andy Kropa/Invision/AP, File)

FILE - Ann Wilson, of the band Heart, performs onstage at the "Vh1 Divas Salute the Troops" on Friday, Dec. 3, 2010 in San Diego. Wilson says she has cancer. The band is postponing the remaining shows on its Royal Flush Tour. (AP Photo/Matt Sayles, File)

FILE - Nancy Wilson, left, and Ann Wilson of Heart perform on opening night of the Heartbreaker Tour at the Cruzan Amphitheater in West Palm Beach, Fla., June 17, 2013. (Photo by Jeff Daly/Invision/AP, File)

FILE - Ann Wilson performs during Farm Aid on Saturday, Sept. 23, 2023, in Noblesville, Ind. (Photo by Amy Harris/Invision/AP, File)