Ray J and Princess Love got into a heated fight … and we’re told things were so bad, police got involved and detained Ray in the back of a squad car.

Law enforcement sources tell TMZ … Ray J came home from a tour Thursday afternoon and he and Princess Love started fighting about their pending divorce.

We’re told Princess called LAPD, claiming Ray J was being aggressive, yelling, and possibly under the influence.

Martin Kove is thrilled his old pal Sly Stallone has become a Hollywood ambassador via President Donald Trump … ’cause he thinks the town has lost its magic by becoming too political — and who better than “Rambo” to straighten things out?

TMZ caught up with the “Karate Kid” and “Cobra Kai” icon at LAX … and he straight-up told us Sly is ready to sweep H’wood’s leg if that’s what needs to be done to bring back some artistic sensibility.

MK is confident Sly — along with Jon Voight and Mel Gibson, also appointed by Trump — will get Hollywood back to making quality entertainment — and get the industry to scrap the soapboxes.

Chad Johnson says Ja’Marr Chase‘s wallet is about to be a whole lot fatter … telling TMZ Sports he’s sure Cincinnati is going to give the wideout a new contract worth “north of” $40 million PER YEAR!!

Chase, of course, has been looking for a redone deal from the Bengals for a while … but now that he’s officially entering his final season before free agency, Johnson tells us a fat payday is near.

Ochocinco says if the Bengals had gotten it done before this past season, they could have paid him roughly $30-$35 million a season. But now, after he led the league in yards, catches and receiving touchdowns — he’s anticipating it’ll be much more.

As for Chase’s teammate, Tee Higgins, Johnson told us he’s expecting some more zeroes on the young wideout’s paychecks soon — explaining he deserves a deal with no “hometown discounts” from here.

“I want him to get what’s fair,” the Cincy legend said. “You don’t take hometown discounts on first contracts.”

Unfortunately for the Bengals, Johnson said paying the receivers likely means they’ll have to trade star pass-rusher Trey Hendrickson … because “it’d be impossible” to make the numbers work.