It's been 84 20 years since "Titanic" came out, but some (head-scratch-worthy) lawsuits never let go.

Last night, Celine Dion wowed the 2017 Billboard Music Awards audience by singing her famous "Titanic" song, "My Heart Will Go On."

Meanwhile, TMZ posted a report that writer/director James Cameron is being sued for $300 million (plus 1 percent of royalties) by a Florida man who claims "he's the inspiration for Jack Dawson," played by Leonardo DiCaprio. At least, that's how TMZ phrased it, but they probably just mean the guy claims he inspired the main love story, including Kate Winslet's character, Rose. The guy who filed suit, Stephen Cummings, probably doesn't think he's the real Jack Dawson since -- 20-year-old spoiler alert -- that guy died when the ship went down.

TMZ referenced the legal docs, which claim James Cameron heard about Cummings through word-of-mouth, after events that took place in Brevard County in 1988 and 1989, and Cameron used Cummings's story for the 1997 film.

As the site reported:

"The ex-'yacht master' also says the depiction of the Titanic sinking was NOT based on history, but instead on stories he told friends about 2 of his relatives who were aboard the real doomed ship. You probably guessed -- the wife survived, the husband did not.

Of course, 1,517 souls were lost that fateful 1912 night ... so we'd imagine there are more than a few such stories."

There's no word on why this guy would wait so long to file a lawsuit, but maybe he wanted to piggy-back on the 20th anniversary. So far, the suit is being met with "good luck with that" laughter, and if this is really all he has, he really does not have much. But at least he's making it count?

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