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Mark Zuckerberg is going all Bill Gates .... giving a massive amount of money to help fight the world's biggest health crisis ... Ebola.

Zuckerberg and his wife Priscilla just donated $25M to the Centers for Disease Control Foundation ... he says he wants to stop the epidemic from becoming a long-term crisis like HIV or polio.

Zuckerberg said the infusion of $$$ is the fastest way to get help to frontline responders, saying "These people are on the ground setting up care centers training local staff, identifying Ebola cases and much more."

The ghost of Joan Rivers has a message for you ... BUY THE iPHONE 6!!! After all, who knows more about the cloud than a ghost?

This post appeared -- briefly -- on Joan's Facebook page Friday morning ... clearly the result of a pre-negotiated deal with Apple. Someone pulled a Ron Popeil ... set it and forget it.

The post was removed pronto.

Lolo Jones says she felt broken, unlovable and embarrassed after she was eliminated from "Dancing with the Stars" Tuesday night ... and penned an emotional letter saying she's sick of being a loser.

The former Olympian unloaded on Facebook right after she got the boot from the ballroom ... saying, "When I was dancing last night and messed up I had flashbacks of the three Olympics and that people constantly tease me about. I thought oh no here it comes again. People are going to ridicule me. I'm so tired of feeling embarrassed."

"I joined the other competitors upstairs and I couldn't force a smile on my face. I felt like vomiting and in between the other dances I went in a back room and fought back tears. I felt so broken. So unlovable. Embarssed."

Jones -- who's been RIPPED in the public over her lackluster performances at the Olympics over the years -- added, "I really wanted to stay on the show and have the layers of hurt wash away by showing the public how hard I work. I wanted to come away a victor for once. I wanted to do so good performing in public that the haters would stop teasing me."

"But that is my way of thinking. Not Gods. Instead I need to trust God that he would heal my heart. That I would not work so hard for the world to validate and redeem me but know that God already conquered that for me on the cross."

She concluded ... "My time was brief but the lesson is lasting. Thank you everyone who wrote me kind messages. You were helping me not fall into darkness."

Stephanie Hayden is now claiming she too was sexually abused as a child by her father, Will Hayden ... and will be providing information to law enforcement to aid in the prosecution of her dad ... TMZ has learned.

Stephanie -- who appeared on the Discovery reality show "Sons of Guns" with her father -- originally came to Will's defense last month after he got arrested for the alleged sexual abuse of his 12-year-old daughter.

We're told Stephanie is now recanting her original statement -- and plans on meeting with investigators in Baton Rouge as early as next week to provide specific details of the sexual abuse she allegedly suffered.

Kris Ford, Stephanie's husband ... recently posted a poem on Facebook that appears to be directed at Will: "You fooled with my wife when she was young. Sucking and groping, do you remember what was done?"

Stephanie went on FB to respond to Kris' poem ... telling a relative she gave her husband permission to post it. Both posts were eventually taken down.

An attorney for Will tells us, "After 45 shows and 20 years, this is the first I've heard of it. Her complaints arose only after her income from the show and [gun] shop stopped. She's still Will's daughter, and he loves her."

Kevin Sorbo now says he made a bonehead move in the middle of the night by trashing Ferguson protesters.

Sorbo went on TMZ Live to address his Facebook post, claiming the rioters were using the shooting of Michael Brown, "as an excuse to be the losers these animals truly are."

Kevin Sorbo unleashed a crazy rant on Facebook about the unrest in Ferguson ... accusing protesters of using the shooting of Michael Brown as "an excuse to be the losers these animals truly are."

The former "Hercules" star, who's a die-hard conservative, said on Facebook, "Ferguson riots have very little to do with the shooting of the young man."

He thinks the rioters are people who failed in life and need to cast blame for their shortcomings.

He wrote, "Hopefully this is a reminder to the African Americans ( I always thought we just Americans. Oh, well.) that their President the [sic] voted in has only made things worse for them, not better."

Sorbo then proceeded to paste the contents of a recent article from the Jewish World Review entitled, "Media Clueless About the Inner City."

12:00 PM PT -- Kevin is now apologizing for his comments.

Dog the Bounty Hunter is going high tech, because he's now figured out a failsafe way to unleash the dog pound on criminals ... thanks to War Machine.

We got Dog at LAX Saturday when he talked about his manhunt for the MMA fighter, who cops caught Friday. Dog says he's never used social media before, but he'll never be without it again, after his troops mobilized in an incredible way.

7:40 PM PDT -- Cops tell us Gracin is being held on a 5150 psychiatric hold. We're told he drove himself to a hospital, with a police escort, after they pulled him over. He's been cooperative, has spoken to his family ... and is being evaluated by doctors now.

5:33 PM PDT -- We're told cops intercepted Gracin on his way home and all they'll say is, "He's safe."

'American Idol' Season 2 finalist Josh Gracin had neighbors and police racing to his door ... after posting what looked like a suicide note in the wake of marital problems.

We're told cops responded to the former Marine's home in Spring Hill, TN -- where he lives with his wife and 4 kids -- for a welfare check after a family member saw an ominous Facebook post:

"I've loved her for 17 years ... I made mistakes ... I admitted them, told her the truth and she turned her back on me when I needed her help the most."

He continued, "Please remember me as someone who gave his all in his music ... Pray for my family as they carry on in this world without me. Goodbye."

Cops rushed to his house -- his wife was there but he wasn't. Law enforcement sources tell us police got in touch with him by phone, put him on with his wife, and he told her he was coming home.

Cops are staying at the home until Josh arrives.

Story developing ...

"Dancing with the Stars" star Cheryl Burke looks dramatically different these days ... but she says she's NOT deathly ill ... hasn't had plastic surgery ... and she's pissed at all the trash talk.

Burke -- who recently dropped a sizable amount of weight -- posted this pic on Facebook ... and got bombarded with comments from people saying she looks anorexic. Someone even suggested she's dying of AIDS.

One person wrote, "Those Botox lips need there [sic] own FB page, gross" ... and another said she should delete the pic before it ends up on TMZ.

Burke is especially upset because she believes the same people who are trash-talking her now are the ones who called her fat before.

Burke -- who was once a regular on the club/party circuit -- tells TMZ there's absolutely nothing wrong with her ... she recently turned 30 and decided to stop drinking and hard partying. She says she's living healthy ... and that what you see is the result of hard work.

Burke tells us, "I didn't have plastic surgery and I don't have an eating disorder. I'm just actually happy."

The "Kill Kendall Jones" Facebook page has been mysteriously taken down.

TMZ broke the story this morning ... Kendall's dad Cody went on the attack against Facebook because the site refused to remove the threatening page, saying it did not rise to the level of genuine risk or physical harm.

Cody disagreed, noting the page showed animals similar to the ones Kendall killed during her hunts but in reverse ... the prey were the victors, standing over the body of the hunter.

Facebook has not given a reason for the take down ... at least so far.

Story developing

The people at Facebook are heartless hypocrites ... censoring hunter/cheerleader Kendall Jones from posting the carcasses of the animals she's killed, but allowing others to post pics advocating Kendall's murder ... so complains Kendall's father.

Cody Jones says he contacted Facebook ... demanding they take down the "Kill Kendall Jones" page. Cody says FB told him to pound sand, because it didn't violate company standards.

The "Kill Kendall" page is a takeoff of Kendall's earlier postings ... where she proudly displayed her kills. The KK page turns the tables ... with the animals standing over a dead hunter.

Facebook tells TMZ, "We remove content and may escalate to law enforcement when we perceive a genuine risk of physical harm, or a direct threat to public safety."

Pam Anderson is pulling the plug on her marriage to Rick Salomon ... TMZ has learned.

This will be Pam's second split from Salomon, whom she married in 2007 and stayed with all of 2 months. She got the marriage annulled. She was also married to Tommy Lee and Kid Rock.

Pam went public in January, saying she married Salomon again.

Interesting timing ... Salomon, a world-class poker player, won $2.8 million in the World Series of Poker Big One for One Drop last Tuesday. Pam filed on Thursday, so under the community property laws she gets half by the skin of her teeth ... unless there's a prenup.

In case you don't recognize Salomon, he's the one who co-starred with Paris Hilton in the famous sex tape, "One Night in Paris."

2:00 PM PDT -- Pam's not publicly known for being religious (more like the total opposite) ... but she just posted this message on Facebook. It appears to be a prayer from Rev. Maryum Morse from the Agape Center.

Here's the insanely rich WhatsApp co-founder Jan Koum posing with his gorgeous girlfriend in Spain earlier this week (left)... and the Facebook baller who purchased the app from him -- Mark Zuckerberg with his beautiful wife (right).

The billion dollar question is...

This is WhatsApp co-founder Jan Koum in Spain with his girlfriend ... celebrating Facebook's $19 BILLION purchase of his company, and his 38th birthday.

WhatsApp has been down all day and RedFoo isn't laughing his ass off one bit ... in fact, the singer says it's totally messing with his business -- so he's taking his patronage elsewhere.

The popular messaging app has been down for a few hours -- just days after being sold to Facebook for 19 BILLION FREAKING DOLLARS -- and RedFoo was pretty pissed about the whole thing.

The LMFAO singer says his girlfriend is also mad ... 'cause he's been MIA without WhatsApp.

Diddy and his entourage rang up a $200 tab at a NYC bar during the Super Bowl ... then STIFFED their waitress on the tip ... according to the bar which is now publicly shaming the multi-millionaire.

Employees say on Sunday Sean Combs and his friends were at The Bar located in the Dream Hotel ... and when the bar manager asked Diddy if he was receiving good service ... Diddy said everything was A-ok.

But when it came time to pay ... staffers say Diddy left a giant goose egg for gratuity.

Now The Bar is calling him out ... ridiculing him on its Facebook page -- "Although [Diddy's] Net worth is in the millions, he felt it necessary to stiff a hard working young girl for $40 bucks. What a gentleman....!!!"