United Kingdom, Oct. 8 -- Dolly Parton has reassured fans that she's "okay" amid rumours about her health.

The 79-year-old singer has taken to social media to address concerns about her recent health issues.

In a video message posted on Instagram, Dolly - who has been shooting some commercials for the Grand Ole Opry - explained: "Everybody thinks that I am sicker than I am."

The chart-topping star added: "Do I look sick to you? I'm working hard here! Anyway, I wanted to put everybody's mind at ease, those of you that seem to be real concerned, which I appreciate. I appreciate your prayers, 'cause I'm a person of faith. I can always use the prayers for anything and everything. But I want you to know that I'm okay."

Dolly explained that...