Controversial TikTok Star Joshua Block just had a major breakdown in Japan … and his erratic behavior got so bad, police had to get involved.

In video obtained by TMZ … Joshua — AKA “World of T-Shirts,” who has a following of nearly 4 million — can be seen screaming incoherently on the street before he repeatedly smashes his face into a wall.

What appears to be his pals grab him and try to make him stop before he really hurts himself … as JB keeps yelling.

There is another video in which JB is being talked to by police … but it does not appear that he is under arrest … which he confirmed in a video of his own, saying it was merely a citizen’s arrest, cops gave him a talking to … and the situation was over.

The videos sparked a heated debate on social media … mostly a combination of worry for Joshua’s mental state … but also the responsibility influencers have with their behavior — especially in another country!

But … that’s sorta Joshua’s MO … ’cause he’s made a name for himself with his wild behavior and antics … which included once literally licking the ground of a subway car.

Mauricio Umansky suffered a major injury on the slopes, saying he broke his clavicle bone while skiing in Colorado, but he’s now on the mend.

The “Real Housewives of Beverly Hills” alum announced the news Friday on Instagram with a series of photos showing him in a hospital bed, along with x-rays of his upper chest, where the clavicle bone is located.

Mauricio wrote that he feels blessed for the way paramedics, hospital workers and others have taken care of him after his accident. He also revealed he needs surgery, while explaining that if you “play hard sometimes you get hurt.”

As you know, Mauricio has been hanging out a lot lately in Aspen. On one occasion, he was seen smooching model Klaudia K — and, on another, he was filmed with his estranged wife, ROBH star Kyle Richards.

We’re told that despite their differences these days, Kyle and Mauricio are “very cool” with each other.

Britney Spears celebrated Valentine’s Day with a dance video … which usually wouldn’t be anything out of the ordinary — but this one got pretty naughty!

Brit posted the vid Friday night … doing her dance in a practically see-through lacey black top and thong with matching black boots and a hat.

As she has done in several dance videos … she rubbed along her toned body, making sure to highlight her assets — but she added a little extra for V-Day when she spanked herself a few times before nearly pulling down her thong to show full-on peach!

Earlier in the week … TMZ broke the news Brit’s old Beverly Hills home — where she was famously stretchered out during her 2008 health troubles — is on the market … and it’s packing one serious price tag!

For a cool $7.99 million, you could own the 6-bedroom, 7-bathroom estate — a luxury oasis in the 24-hour guard-gated Summit community, complete with a soundproof screening room/music studio, plus all the other usual high-end perks.