Porn Star Andy San Dimas Busted -- Sorry My Sexy Unicorn Dance Screwed Over a Cop

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Porn Star Busted
My Sexy Unicorn Dance
Screwed a Cop ... SORRY

Posing with porn star Andy San Dimas -- while wearing a UNICORN HEAD -- has a Pittsburgh cop in huge trouble, but San Dimas claims the whole booty-shaking mess is a giant misunderstanding.

This all went down last weekend during a Pirates game at PNC Park, where Andy says she was doing her best to get on the jumbotron ... by shaking her ass in cut-off shorts, while wearing a unicorn head mask!

Awesome, right? Wrong ... because Andy says when an usher asked her to sit down, she tried to rile up the crowd by shouting back, "Oh, I'm sorry I was trying to have a good time at the f**king Pirates game!"

Not smart ... Andy was hauled off to the Pittsburgh PD station at the ballpark.

Andy says the cops were very friendly, and told her they had to boot her from the park -- but not before one officer asked to try on the mask.

Not smart again. That "unicorn cop" is now reportedly under investigation. It's unclear if it's the unicorn mask, the porn star -- or both -- that got him in trouble.

Either way, Andy says she hopes the cop doesn't get screwed ... since he was totally professional and "did nothing wrong."

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Dustin Zito Arrested -- 'Real World' Star Pepper Sprayed By Cops & Busted for Sexual Battery

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'Real World' Star
Pepper Sprayed By Cops ...
Arrested for Sexual Battery
A former "Real World: Las Vegas" star learned the hard way NOT to put his hand up a girl's skirt (allegedly) ... after it landed him in the back of a cop car, pepper-sprayed to the nines.

Dustin Zito -- known as the 2011 housemate who did gay porn -- was arrested Saturday night, outside a bar in Louisiana. Cops say Zito allegedly tried to reach up a woman's skirt and touch her inappropriately. The woman reported the incident to police.

But it didn't end there ... cops say when they showed up, Zito violently resisted the arrest. So they used pepper spray to subdue him and take him into custody. Ouch.

He was charged with sexual battery and resisting an officer violently.

Zito remains in jail. A court date is set for July 16th.

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Joe McKnight Arrested -- NY Jets Running Back Busted In Jersey

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NY Jets Star Joe McKnight
Arrested In Jersey
More trouble for the New York Jets -- ANOTHER running back was arrested. This time, the perp is Joe McKnight who was busted in Jersey on outstanding warrants during a routine traffic stop.

McKnight -- who was drafted out of USC in 2010 -- was initially pulled over in Hanover Township on July 30 around 11am after cops noticed his 2010 Mercedes speeding and changing lanes without signaling.

But during the stop, the officer ran Joe's plates -- and noticed outstanding warrants for his arrest for (1) failing to pay a $200 fine because he didn't have proof of insurance during a previous incident and (2) failing to pay a $120 fine for a prior routine traffic violation.

According to the New York Post, 25-year-old McKnight was cuffed and hauled to a nearby station where he was booked and released after posting the $320 bail. 

It hasn't been a great off-season for Jets running backs -- back in May, McKnight's teammate Mike Goodson was popped on Route 80 after cops say he was in possession of drugs and guns. He pled not guilty to those charges.

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Nick Stahl -- Breaking Bad Again ... Busted for Meth Possession

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Nick Stahl
Breaking Bad Again
Busted for Meth
Nick Stahl is back in jail after getting busted for drugs early this morning ... TMZ has learned.

LAPD tells us the "Terminator 3" star was arrested around 5 AM when police found him in a Hollywood motel with three other people ... they were all allegedly using meth. 

Stahl was taken into custody -- along with the other individuals.

We're told police actually went to the motel to conduct a parole compliance check on one of the people Stahl was hanging with this morning.

Wrong place, wrong time for Stahl ... who's battled drug addiction for years.

Just yesterday, Nick told us he was happy he was placed on a 5150 hold earlier this month -- because it helped straighten him out.

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