Ailing Dolly Parton is still working from her sickbed despite being ordered to rest up – and loved ones worry the country legend is stressing herself into an early grave if she doesn't slow down and give herself time to recuperate, RadarOnline.com can reveal.

The 9 to 5 superstar, 79, was forced to cancel a string of concerts, including her upcoming Las Vegas residency, after suffering a series of health setbacks in recent months. Article continues below advertisement

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After being laid low with a devastating infection caused by kidney stones , she retreated to the sanctuary of her sprawling ranch in Brentwood, Tennes

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