Dolly Parton Death

Tributes are pouring in for Dolly Parton following the legend's death ... with stars from across entertainment sharing their heartbreak.

Kacey Musgraves was among the first to react, posting several emotional messages Tuesday, including, "Dolly. 💔 This really really hurts."

She later wrote, "The world feels a lot less sparkly all of a sudden" ... and referenced Dolly's late husband, Carl Dean, saying, "So glad she's with her Carl Dean. No one talk to me today."

Donald Trump has announced a national mourning period for Dolly Parton ... ordering American flags to be lowered for one week.

POTUS jumped on Truth Social to pay tribute to Dolly after her sudden death Tuesday ... writing, "There has never been anyone like her, and never will."

Trump then announced that -- beginning at 6 PM Tuesday -- American flags across the country should be lowered to honor her legacy.