"We will remain by her side until the time comes to say goodbye," they wrote.
Kings of Leon have flown home to be by their ailing mother's side. The group -- fronted by brothers Caleb, Jared and Nathan Followill -- informed fans on Thursday (Sept. 23) that they would be unable to perform their planned show that night at Shoreline Amphitheatre in San Francisco in order to spend time with their mother, Betty-Ann.
“Our mother, who many of our fans know and love, has been dealing with a medical crisis for the last several weeks and while it has been hard to take the stage each night, it has been the love and energy from you, our fans, that has gotten us through," they wrote in a letter to fans. "Just before taking the stage at The Forum we learned she took a turn for the worse. It was a hard show to get through, but you held us up that night in a way we will never forget.”