Hook Ups

Khloe Kardashian and Game are really great friends ... which totally explains why her ass had a great time twerking all over his junk in a nightclub.

However, it does NOT explain why her mom was watching it all go down! Ewww ...

Ryan Seacrest was pimping his face off at a Hollywood nightclub ... slipping into a chauffeur driven ride with 2 babes. And the best part of his smooth move -- he doesn't have to explain it to current GF Shayna Taylor.

Rule #1: Seacrest always wins.

Khloe Kardashian gave Game an assful last night in Hollywood ... twerking hard on the rapper in the middle of a packed nightclub.

Khloe put on a clinic in Tru Nightclub with moves that screamed, "I'm single and ready to mingle" ... with Game's crotch.

While we've seen Game and Khloe kick it in clubs before ... we've NEVER seen them on the dance floor like this. They always deny they're together -- but there's no denying their genitals were together last night.

Khloe and Game had a chaperone -- Kris Jenner was also in the club -- but clearly they couldn't care less.

By the way ... Khloe, and her ass, look amazing. Big mistake, Lamar ... big mistake.

Drake and Rihanna got back together this weekend -- at least for a couple hours -- partying it up at the same table inside an L.A. nightclub Friday ... and we're told they were getting preeeeetty cozy.

Sources tell us, Dreezy and Ri-Ri arrived separately at Hollywood's Hooray Henry's late Friday night ... but spent the next few hours getting close at Drake's VIP table. No flagrant PDA, but we're told they were definitely being affectionate.

The on-again off-again couple left in separate cars early Saturday AM -- but this is interesting ... we're told they left only minutes apart.

Drake has most recently been linked to Lenny Kravitz's daughter Zoe -- as recently as a couple weeks ago -- but old habits die hard.

Sean Penn isn't afraid of a little PDA -- full on grabbing Charlize Theron's ass at a children's petting zoo this weekend ... and kissing her neck like it was the last neck on earth.

Sean and Charlize took the actress's 2-year-old son Jackson to Underwood Family Farms in Moorpark on Sunday -- a pretty couple-y move -- and the baby animals weren't the only ones getting some love.

The guy who owns the jiu-jitsu studio where Thiago Silva allegedly whipped out a gun and threatened to shoot a bunch of people has shut his doors ... but only for a couple days ... in the wake of the insane events that occurred this week.

According to the police report, not only did the UFC star pull up to the studio and threaten to kill his wife and her alleged new boyfriend ... he also threatened to shoot everyone inside the studio.

Which is why the people who run the place decided to shut it down for a few days ... posting a sign on the door Saturday to let patrons know they'd resume business on Monday.

Prosecutors in the Justin Bieber Miami Beach misdemeanor DUI case are hunting down witnesses across the country ... including Bieber's own girlfriend ... in an attempt to nail him.

Sources connected with the investigation tell us ... investigators have been hounding Chantel Jeffries and her friends and relatives, trying to get her to sing like a bird and incriminate the Biebs.

Sources in the State Attorney's Office tell TMZ ... it's not unusual for them to go on the hunt for witnesses, even though this is a routine DUI misdemeanor case.

But here's what we know. If they get to Chantel, she's not going to help their case. We're told she is clear -- Justin did NOT drink or smoke weed in the club before getting in the Lambo. She also insists the drag racing claim is total BS -- that they never went faster than around 40 MPH.

TMZ broke the story ... prosecutors have problems with the case. First of all, cops claimed Bieber reeked of booze in the car and when he was at the station, but he registered an imperceptible .014. And as for the drag racing claim ... the GPS readout shows the max speed at 44 MPH, and during the so-called drag race he was going 27 MPH -- below the speed limit.

So we gotta ask ...

Kris Jenner won't be happy about this -- her youngest daughter's been hanging out inside Justin Bieber's famously drugged-out house ... and if that wasn't bad enough, she's even getting cozy with his bad news BFF Lil Za ... who was just charged with 3 FELONIES.

The photo was taken Sunday inside Bieber's kitchen -- where the singer's always kept a giant weed stash -- and it's clear ... Kylie is getting comfy with Za.

The other pics were taken earlier this week -- Za posted them on his Instagram ... referring to himself and Kylie as "best friends."

Probably a bad idea -- Za is 20 and Kylie's only 16 ... not to mention the fact that just last Friday, Za was charged with 3 felonies in connection with the police raid on Bieber's house a couple weeks ago.

As we reported, Za was arrested after the raid when police claim they found MDMA (ecstasy) and Oxycodone near him in the house. He's been charged with felony possession of controlled substances and another felony for breaking a jail phone.

"Real Housewives of New York" star Ramona Singer has filed for divorce ... and judging from her legal docs she's out for blood in the wake of rumors her hubby cheated on her.

According to legal docs -- obtained by TMZ -- Ramona wants ALL of their houses -- an apartment in NYC and a house in the ritzy Hamptons.

Earlier this week Ramona called 911 for a domestic dispute after she claimed to have found Mario -- her husband of more than 2 decades -- in the house with another woman.

Ramona says the marriage is irretrievably broken ... and says it's been that way for at least 6 months.

The couple has one daughter ... who is 18.

Fear not NFL fans -- the giant prostitution sting in NYC will NOT ruin Super Bowl week ... so says Carolina Panthers running back DeAngelo Williams.

As we previously reported, cops in the Big Apple just busted a dozen hookers who had allegedly been advertising their "services" all over town ... a huge blow to people hoping to bang whores during the big weekend.

But Williams has a message to those who will affected by the sudden ho shortage -- it's ok, you'll get through it.

Mike Ditka KNOWS ALL ... including the secrets to dating -- so listen up, 'cause Coach is about to drop some serious relationship knowledge.

Just follow these simple steps ...

Ditka Dating Rule #1 -- Don't give your girlfriend too much money ... "she'll think she's entitled to it"

Ditka Dating Rule #2 -- Make sure your girlfriend's not banging anyone else ... "you gotta be the only guy in her life, man."

Ditka Dating Rule #3 -- Don't keep in touch with ex-girlfriends ... "I just have my current ones and my wife."

Justin Bieber's new chick is pissed about reports claiming she has a string of arrests in her past ... and has one big regret about hanging with Bieber in Miami and Panama -- it's exposed her life to the world ... warts and all.

Chantel Jeffries -- who was in the Lambo the night Justin was cuffed -- tells TMZ, "I have not been arrested five times as has been stated in the media, nor am I guilty of physically assaulting anyone, in any way shape or form."

A NY newspaper reported 21-year-old Chantel has a lengthy rap sheet, including busts for assault with a deadly weapon (a knife) and reckless driving -- 92 mph in a 70.

Her attorney Matt Morgan tells us ... Chantel was arrested when she was 18 for a misdemeanor assault, but it was ultimately dismissed due to insufficient evidence. Other than that, he says she's only had "traffic violations."

Chantel also denies being thirsty for publicity, saying ... "I am a full time student who had enjoyed a normal lifestyle, free from public scrutiny and criticism, until now.

She adds, "What has happened to me is wrong."

Presumably Chantel means the media attention, and NOT ... joyriding in a Lamborghini, and flying by private jet to a Panamanian resort with an international superstar.

Dean McDermott's been hitting the bottle in rehab ... but this beverage won't derail his treatment because it looks like it's all part of his plan to get healthy.

Dean left his rehab facility over the weekend for an outing -- with other patients -- and carried his own refreshment ... a healthy bottle of Kefir -- a vitamin-rich fermented milk drink.

McDermott checked himself into a treatment program in L.A. last week for "health and personal reasons" ... and apologized for "the pain" he caused his family -- an apparent reference to reports he cheated on Tori Spelling.

With his ex-GF out of the picture (she's all yours Bieber), TMZ Sports has learned Philadelphia Eagles superstar DeSean Jackson has been hangin' out with a new chick in Hawaii ... a bigtime porn star.

We've learned ... DJ's been getting close with Michelle Maylene (34B-24-32) ... star of such films as "Da Vinci Load," "Fine Ass Bitches 4" and "Slant Eye for the Straight Guy 2."

Sources tell TMZ Sports ... the two are not "official" or anything -- just enjoying each other's time. They're currently in Hawaii where DJ is playing in the Pro Bowl.

We broke the story ... DeSean's ex-GF Chantel Jeffries was the passenger in Justin Bieber's Lambo when he was arrested last week.

Justin Verlander and Kate Upton are back together, and no one's happier than a boat load of teenage boys in Tampa.

Sure, sources tell us the boys in this video shot today were definitely cheering more for getting a peek of Kate in-person (primo material for any hormone-filled boy) -- and probably never noticed the Cy Young winner.

But still ... the Detroit Tigers ace and the supermodel were spotted all over each other -- partying on a boat for Tampa's annual pirate-themed Gasparilla festival.

Justin sported the traditional buccaneer eye patch as a costume. Kate's costume -- just looking hot.

Selena Gomez can pound sand. Justin Bieber's new girl stuck by his side in Miami the night after his DUI arrest ... and emerged this morning for a pretty epic walk of shame.

As we reported, self-proclaimed model Chantel Jeffries was riding shotgun in Bieber's yellow Lamborghini when he was popped for DUI.

And clearly, it was more than just a random hookup ... Chantel crashed with Bieber in his rented Miami mansion just hours after he was released from the pokey.

Meanwhile, Selena was out on the town in L.A., smiling and signing autographs for fans.