Michael Jackson's Alleged BF -- On the Run

Dr. Arnold Klein's office manager -- who claims he was Michael Jackson's lover -- is facing such intense death threats that he's moving from place to place ... hiding out from angry MJ fans.

A source close to Dr. Klein and Jason Pfeiffer tells TMZ incensed Jackson fans have walked right up to Pfeiffer's home and knocked on his door -- and they've also tracked him down at his friends' houses.

Since Jason went public last week with allegations of an affair with Michael, we're told violent and homophobic threats have poured into Dr. Klein's office by phone, fax, and email. According to the source one voicemail said, "I'm gonna put a bullet in your heads."

Klein and Pfeiffer have hired bodyguards, and reported the threats to the FBI. We're told Pfeiffer is currently at a private location with friends.

David Boreanaz -- The Marriage is Stable

Sources intimately familiar with the David Boreanaz situation tell us his marriage to actress Jaime Bergman (pictured right) is "stable" -- despite the ongoing legal drama involving one of David's mistresses.

We're told the "Bones" actor and his wife have no plans for divorce -- and today they even ran several errands together in L.A.

As for David's wife, we're told she's the one who pushed David to publicly confess his liaison with the mistress .. the mistress who was demanding 6 figures, via Gloria Allred.

We're also told Jaime is handling the drama with the mystery woman pretty well -- but she had a much tougher time when David told her about his relationship with Rachel Uchitel. David told his wife about Rachel just a month before the Tiger Woods scandal broke ... a day before Star Magazine broke the story.

Keanu & Charlize The Long Kiss Goodnight

Keanu Reeves and Charlize Theron didn't just share a romantic dinner at a Beverly Hills restaurant last night -- they also shared a really intimate goodbye hug and kiss on the way out.

As the two walked out of Bouchon restaurant, the two locked in a really snug embrace and then tenderly swapped some cheek kisses.

It wasn't exactly a makeout session -- but it wasn't the way you'd send off your grandmother either.

UPDATE: More evidence -- when they hugged each other goodbye, Charlize's hands are clearly UNDER KEANU'S JACKET!

So we gotta ask ...

Charlie and Brooke There is No Divorce

Charlie Sheen and Brooke Mueller have their problems, but, contrary to reports, they have not decided to pull the plug on their marriage -- this according to both sides.

Charlie's rep released a statement to TMZ from the Sheen/Mueller camp, saying, "Please let us clarify this: They are not seeking a divorce nor has one been contemplated. There has been no financial agreements between the parties of any sort. Stories to the contrary are false."

End of story. At least for now.

Jermaine Jackson -- Curse You, Dr. Klein!

Michael Jackson's brother Jermaine had a few words for Dr. Arnie Klein this morning regarding his accusations that MJ was gay -- most of them of the four-letter variety.

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Michael Jackson's Dad -- 'He Was Not Gay'

Joe Jackson is pissed at Michael Jackson's former best friend/doctor, Arnold Klein, for telling TMZ MJ was gay and had a relationship with Klein's office manager.

Joe railed at Klein, telling TMZ, "It's not true. Michael was not gay."

Joe feels Klein has betrayed his son: "He has no respect for Michael ... to say things about him when he's gone is shameful."

Jason Pfeiffer was on TV last week, claiming he had a sexual relationship with Michael, and Dr. Arnold Klein spoke of walking in on the two men and seeing them with their shirts off. In the last few days, Dr. Klein has told TMZ Jackson was gay and had no problem with people knowing about it.

Joe Jackson went on, "He's a doctor and knows better than to break his vows against a patient."

Justin & Jessica Nice Grip

Hipster lovebirds Justin Timberlake and Jessica Biel were spotted holding hands after leaving a Broadway performance of Tony winning musical "In the Heights" on Sunday.

This should squash breakup rumors for at least the next few hours.

Halle Berry -- Mystery Date?

Single lady Halle Berry was spotted in NYC last night with a new guy ... on the day news came out of her split with baby daddy Gabriel Aubry.

That Halle sure rebounds fast.

Derek Fisher: 'I'm No Kid Rock'

Los Angeles Lakers star Derek Fisher wants to make one thing clear -- he's no Waffle House brawler.

Reports surfaced yesterday that the Lakers guard was involved in a fight at a Waffle House in Oklahoma City last week.

But Derek told TMZ the full story, and says the only truth is he was at a Waffle House -- a year ago!

He says the brawl went down when two dudes began scrapping over Derek's autograph. Derek says he was "an innocent bystander," and cops eventually broke up the fight.

Derek is unclear why this old story is just coming up.

We're sure it has nothing to do with OKC Thunder fans trying to get in Fisher's head before game 6 .

Bullock's Baby Secret -- 4 Mysterious Months

Ever since January, Sandra Bullock trekked out in public with a newborn secret hidden away at home -- but now that the cat's out of the bag, check out these pics ... did it look like Sandra was hiding something?!

Jenna Jameson The Striking Contradiction

Jenna Jameson has told two completely different -- and contradicting -- stories about the incident that led to the arrest of her baby daddy Tito Ortiz yesterday ... and they're both caught on tape.

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When we first saw Jenna last night -- around 8 PM -- she adamantly stated that Tito did not beat her up.

But a few hours later -- around 10 PM -- the story had changed ... and Jenna repeatedly referred to Tito as a "wife beater."

So what happened in the time span between her stories? Well, one minor thing -- around 9:30 PM -- Tito held a press conference in which the fighter claims he never touched her ... and insinuated that Jenna's injuries were the result of her alleged addiction to OxyContin.

So now the question is ...

Jesse James' Barren Ring Finger

Jesse James wasn't wearing his wedding ring this morning -- yet another sign his marriage to Sandra Bullock is shaky.

James and his ring-less finger were spotted as he was dropping his kids off at school in Long Beach.

James typically wore the ring ... as recently as a month ago.

Kate Hudson -- Did She or Didn't She?

Kate Hudson enjoyed the sights and sounds of Coachella this weekend, but all eyes are focused squarely on Kate's much-talked about body.

A report surfaced last week that Kate had a breast augmentation. Her reps haven't commented, but we have to ask ...

Kim K's Greasy Lunch -- with Cristiano Ronaldo

While in Madrid this week, Kim Kardashian ate out with Euro Greasy soccer stud Cristiano Ronaldo.

Kim and the Real Madrid hunk were spotted leaving the same lunch spot -- and while reports say the duo kissed inside the restaurant, we're told they kept their mouths to their food.

Whether American football players or European futbol stars, a gal's gotta eat.

Shawn Southwick's Alleged BF Admits 'Mistakes'

Shawn Southwick's accusing Larry King of cheating, according to sources, but months before the divorce it was Shawn facing cheating allegations...with a little league coach who admitted, on camera, that "mistakes" were made.

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Hector Penate -- actor and former baseball coach to Larry and Shawn's sons -- spoke to a TMZ cameraman last September about the alleged infidelity. Hector's not-so-cryptic answer: "one thing led to another..."

Shawn denied anything went down...but ya think Larry's lawyers want to talk to this guy?

Paris Hilton Clearly, Not Into Bush

Paris Hilton wants to set the record straight about Reggie Bush -- the heiress told us there were no sparks between the two of them in Vegas last weekend ... because they didn't talk to each other.

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As we previously reported, the two partied right next to each other at Tao in Vegas -- but according to Paris, any insinuation that she hooked up with her ex-BFF's ex-BF is nothing more than "stupid rumors."