'LA Ink' Star Hospitalized INSANE TAXI CRASH

"LA Ink" star Ruthless was rushed to an L.A. hospital this week after a taxi she was riding in smashed into another car ... and then backed into TWO MORE vehicles -- TMZ has learned.

TMZ spoke with 26-year-old Ruth "Ruthless" Pineda ... who says her cabbie jumped out of the car to check out the damage after the initial collision ... but for some reason, the taxi was IN REVERSE!!!

The cabbie quickly jumped back in the taxi and tried to slam on the brake -- but he was so flustered, that he accidentally hit the gas ... sending the car roaring back into two parked cars.

Ruthless says she was rushed to a nearby hospital ... where she was treated for neck and back injuries. She was released the next day ... but tells us, "I'm still in a lot of pain but recovering"

Pineda has had some bad luck with cars lately -- as we previously reported Ruthless was also hospitalized a few months ago when a semi truck slammed into her Mercedes.

Kat Von D 'LA Ink' CANCELLED

TLC has had enough of Kat Von D -- the network has announced her reality show "LA Ink" has officially been canceled.

A rep for TLC just released a statement, claiming, the network "has decided that the current season of LA Ink will be its last." The final episode will air next month.

The rep adds, "The network is proud of what the series has accomplished in its four seasons, following Kat Von D's journey as an artist from Miami to Los Angeles."

The show originally premiered in 2007 -- and got a small ratings boost last month, after Kat split from Jesse James. But apparently it wasn't enough.

1:55 PM: Kat posted a statement on Twitter claiming SHE made the decision to end "L.A. Ink" ... not TLC ... and insinuates the network is spinning the truth to make her look bad.

Kat writes, "I love how me deciding to not continue doing LA Ink, turns into being 'cancelled.' Thanks @TLC."

'LA Ink' Star Hospitalized After Semi Truck Crash

"LA Ink" star Ruthless was rushed to an Orange County hospital Friday after her car got DEMOLISHED by a SEMI TRUCK ... and the photos show the unbelievable damage.

The 26-year-old -- real name Ruth Pineda -- claims she was on her way to some appointment on Friday ... when a semi truck slammed into her Mercedes 300 E.

Pineda was rushed to a nearby hospital on a stretcher after the accident -- where she remained under close supervision for more than 12 hours. A few days later, Ruth took to Facebook to say she's alright ... and even post a few pictures of the aftermath.