“Last night, I was up all night praying for my sister, Dolly,” Parton posted (via Complex).

“I know lately, everybody thinks that I am sicker than I am,” the country artist said in a video posted to Instagram on Wednesday, “Do I look sick to you? I’m working hard here!”

Parton has delayed six December dates at The Colosseum at Caesars Palace until September next year, explaining she needs “a few procedures” to cope with ongoing “health challenges”.