Tragedy has struck an ’80s-themed Royal Caribbean cruise … the fiancée of Faster Pussycat’s lead singer has died after going overboard, though her body remains missing, TMZ has learned.

Kimberly Burch — fiancée of Faster Pussycat frontman Taime Downe — fell to her death shortly after a heated argument with him aboard the ship, according to Kimberly’s mother.

Carnell Burch tells TMZ … Taime called her on Monday to deliver the heartbreaking news. It’s still unclear whether Kimberly jumped or accidentally fell from the ship, but Carnell is confident Kimberly wouldn’t purposefully hurt herself.

A Royal Caribbean Group spokesperson tells TMZ … “Our crew immediately launched a search and rescue effort, is working with local authorities, and we are providing support and assistance to the guest’s family during this difficult time. To respect the privacy of our guest’s family, we have no additional details to share.”

Kimberly was accompanying Taime Downe and Faster Pussycat, as the band was a featured act on The 80s Cruise — a nostalgia-themed trip that also featured performances from Squeeze, Adam Ant, Tiffany, and Men at Work. The incident reportedly took place on the first day of the 7-day roundtrip, which set off from Miami.

A U.S. Coast Guard spokesperson tells TMZ … the incident happened roughly 20 miles away from Freeport, Bahamas. The Coast Guard deployed a helicopter crew and other personnel to assist the Royal Bahamas Defense Force in their search. The Royal Bahamas Defense Force later suspended search efforts.

Kimberly’s mother tells us she has not spoken to authorities yet, and Kimberly’s family is trying to get ahold of them, as they are looking to recover the body.

We’re told Taime and Kimberly were together for about 6 to 7 years.

Kim was 56.

Millie Bobby Brown is clapping back at “disturbing” critics for ruthlessly dissecting her appearance as she grows up in front of the public eye.

The “Enola Holmes” star shared a lengthy video on Instagram Monday night directly naming “disillusioned” writers behind the recent rise in articles claiming she’s aging poorly, saying … “This isn’t journalism. This is bullying.”

Taking another swipe at trolls — who she says are “desperate to tear young women down” — she quips … “I grew up in front of the world, and for some reason, people can’t seem to grow up with me.”

Her message struck a chord in Hollywood, as her comment section was immediately flooded with support from her peers, including Sarah Jessica Parker, Bella Thorne and Sharon Stone.

This is far from the first time the British actress has clapped back at the overwhelming amount of hate she’s garnered recently.

Just days ago, she shared a British Vogue article titled “No One Cares How Old You Think Millie Bobby Brown Looks.”

Millie was thrust into the spotlight when “Stranger Things” premiered in 2016. Since then, she’s starred in several successful films and married Jon Bon Jovi’s son, Jake Bongiovi.

Politics ain’t the only thing Johnny Damon and Donald Trump agree on … the former MLB star tells TMZ Sports POTUS is right when it comes to Pete Rose‘s Hall of Fame candidacy as well.

Trump took to his Truth Social page on Friday night to demand MLB “get off its fat, lazy ass” and put Rose into Cooperstown … and when we spoke with Damon about the opinion on Monday, he told us he concurred.

The ex-Red Sox outfielder — who actually served on the President’s Council on Sports, Fitness and Nutrition during Trump’s first term in D.C. — said the game’s climate has changed so much since Rose was first given a perma-ban for gambling on baseball that he now thinks it’s about time to get the MLB’s Hit King into the HOF.

“I know he made a mistake at one time and it’s been so long and now all these baseball teams, they have these gambling sites that sponsor the teams,” Damon told us. “I don’t think Pete Rose did as much as what’s going on right now.”

Damon argued, too, that what Rose did wasn’t all that unforgiveable — noting he only “bet on his team to win.”

“At least he didn’t bet on his team to lose,” Damon said.