United Kingdom, Oct. 8 -- Dolly Parton's sister has asked fans to pray for the country music legend.

The 9 to 5 hitmaker postponed her scheduled Las Vegas residency last week as she informed fans that she requires a "few procedures" to deal with "health challenges" and her younger sibling Freida Parton has urged the star's fans to say their prayers in support of her.

Freida wrote in a post on Facebook: "Last night, I was up all night praying for my sister, Dolly. Many of you know she hasn't been feeling her best lately.

"I truly believe in the power of prayer, and I have been lead to ask all of the world that loves her to be prayer warriors and pray with me."

Frieda struck an upbeat tone to end her message.

She added: "She's strong, ...