Jersey Shore

It was a totally different Situation in Las Vegas last night ... where the "Jersey Shore" star celebrated his birthday without any of trademarks making an appearance.

Sitch turned 30 back on July 4 and finally got around to celebrating in Sin City at Señor Frogs, located inside the Treasure Island hotel. The night was very low key -- not only did Sitch not gel up his air or flaunt his abs ... but our spies say he didn't touch a drop of alcohol.

Change is good.

Snooki did NOT secretly get married to her baby daddy Jionni LaValle ... and she did NOT secretly take the guy's name either -- despite what her ultrasound says -- sources tell TMZ.

In case you missed Thursday night's episode of "Snooki & Jwoww" -- the Snookster unveiled her highly-anticipated ultrasound ... and Snooki's name is listed as "Nicole LaValle."

But Snooki sources tell TMZ, the ultrasound is WRONG -- because Snooki's real name is still legally "Nicole Polizzi." The doctor's office simply entered the wrong name by accident.

And for all you conspiracy theorists -- the source adds, "Snooki is 100% not married ... yet."

"Jersey Shore" star Deena Cortese won't face criminal charges after her disorderly conduct arrest last month -- but she WAS slapped with a hilarious fine ... for "failing to use the sidewalk."

TMZ broke the story ... Deena was busted last month in Seaside Heights for dancing like an idiot in the streets. Deena's PARENTS bailed her out of jail later that day.

Lucky for Deena, the disorderly conduct charge was dropped today in court -- but the "Jersey" girl didn't get off scot-free ... prosecutors charged her with what's called "title 39" instead ... or "failing to keep your crazy ass off the street."

With her unborn baby due in a couple of months, "Jersey Shore" former party girl Snooki used a stroller to transport a case of Coors Light in Seaside Heights on Monday.

Just because she's carrying an unborn baby inside her and not downing tequila shots doesn't mean anything has changed for Snooki ... as the pint-sized mother-to-be once again stumbled to the ground in Seaside Heights on Thursday.

Rockin' a pair of maternity platform sandals, the unmarried "Jersey Shore" star lost her footing and took a sober tumble on to the sidewalk yesterday. Luckily, she was uninjured, quickly got up and went on her non-alcoholic merry way.

After long hours of GTL, "Jersey Shore" dudes Ronnie, Pauly D, Vinny and The Situation showed off their bronzed, buff bods at the beach in Seaside Heights on Wednesday.

Question is ...

One of the guys who allegedly got his face bashed in by Ronnie from "Jersey Shore" last week has filed a criminal complaint with police -- and TMZ has learned, it spells big trouble for the reality star.

As we previously reported, a guy named Justin Vigerito (above) was drinking with Ronnie and Jwoww's BF last Friday at a place called Bamboo Bar in Seaside Heights, NJ. According to Justin, his friend Devon tried to join the party ... but someone from the "Shore" crew shoved him in the back, starting a huge brawl.

Justin said he went to help his friend -- and Ronnie clocked him in the face ... before punching him several more times. (Ronnie's been telling friends any punches he threw were in self-defense.)

Now, Justin has gone to cops -- filing a criminal complaint against Ronnie for assault. Seaside Heights police are investigating the incident.

But it's all bad news for Ronnie -- who enrolled in an 18-month pretrial intervention program last year, stemming from his last violent Shore encounter in 2009, when Ronnie allegedly punched another guy in the face.

The program will allow Ronnie to avoid assault charges from the 2009 incident -- but only if he completes his required community service ... and keeps his nose clean.

Perhaps too pregnant to deal with the arduous task of walking, Snooki rode an electric scooter around Seaside Heights with fellow "Jersey Shore" cast member Deena, who managed to not get arrested during the outing.

Just like two guidettes in a pod, "Jersey Shore" meatballs Deena and Snooki now have matching drunken and disheveled classic mug shots.

Question is ...

Congrats to Deena Cortese -- her mug shot is an instant classic, 'cause the "Jersey Shore" star is sporting a look that screams WASTED.

TMZ obtained the mug shot taken last weekend by Seaside Heights PD after her arrest for disorderly conduct.

As TMZ first reported, Deena was busted on Sunday when she was dancing in the street outside a Mexican restaurant ... and drawing huge crowds of fans. Deena's parents bailed her out of jail later that day.

Her arraignment is scheduled for July 3.

Deena from "Jersey Shore" doesn't like being heckled ... in fact, she WENT OFF on a couple of troublemakers in Jersey this weekend ... and then attacked 'em with a basketball.

Deena was TRYING to shoot a scene for the MTV show while playing a basketball carnival game on the boardwalk on Sunday ... when a couple of hooligans started harassing her from a distance.

Deena flipped out -- stopping production to tear the people a couple of new a-holes ... and then firing a basketball at them. It's unclear if she connected ... but probably not ... she's got a weak arm.

Eventually, the hecklers shut their mouths and let Deena do her thing ... and we all know how that turned out ... 'cause she was arrested for disorderly conduct a short time later.

Snooki's ex-BF Emilio Masella is adamant ... he's not the mastermind behind the naked Snooki photos that leaked onto the Internet last week -- telling TMZ, he never even saw them before they hit the web.

In case you haven't checked out the pics -- they're basically a bunch of selfies taken inside a hotel room. Snooki's standing in front of a mirror in various states of undress, grabbing her boobs, etc -- pretty tame compared to some episodes of "Jersey Shore."

But Emilio insists he wasn't on the receiving end of the pictures -- claiming it must have been a more recent flame based on Snooki's body. Emilio didn't say what clues gave away the time frame.

Deena Nicole Cortese is a free woman ... the "Jersey Shore" starlet was seen leaving a NJ jail with her mommy and daddy by her side yesterday after she was busted for disorderly conduct.

TMZ broke the story ... Deena was arrested in Seaside Heights on Sunday afternoon after allegedly acting like a drunken buffoon in the middle of the street and blocking the flow of traffic.

After Deena was taken to the pokey, she got a visit from a few of her MTV costars -- including Ronnie, Jwoww, Sammi and Snooki.

Eventually Deena's parents walked the reality star out of the big house -- with her dad giving her the look of disappointment.

"Jersey Shore" star Deena Cortese was arrested for disorderly conduct this afternoon in Seaside Heights, NJ ... law enforcement sources tell TMZ.

In a video obtained by TMZ, Deena can be seen dancing through the streets. The cops seem to be tolerating her behavior for a few minutes, but after awhile they decide they've had enough.

You can see Deena cuffed, put in the back of a cop car and driven away ... while Ronnie and Sammi look on.

The "Jersey Shore" brawl that went down Friday night had some collateral damage -- Jwoww was seen yesterday hopping around town on crutches!

As TMZ first reported, two guys claim they were sucker-punched by Ronnie and a few of the fellas from "JS" ... but sources close to the guys tell us they did not throw the first punch.

Seems Jwoww got caught in the crossfire, as she was seen with her foot heavily bandaged and using crutches. One source told us she suffered a sprained ankle.

The guys from "Jersey Shore" who got into a bar fight last night are claiming it was all self-defense and they were NOT the ones who swung first ... sources close to the show tell TMZ.

As TMZ first reported, two guys claim they were on the receiving end of an unprovoked attack from Ronnie and Roger and are now planning on suing.

But our sources tell a different story -- claiming the two guys were taunting the cast all night and security at the club even tried to get them to leave. Our sources say the guys refused and proceeded to get into the face of Roger and of a friend of Pauly D's named Ryan Labbe.

Our sources say the two guys then threatened to "knock them out" and that's when someone took a swing at Pauly D and all hell broke loose. We're told Ronnie and Roger (along with Pauly D and The Situation) were simply coming to the aid of their guido friend.

We might not find out what really happened ... until the show premieres.