Weight Loss & Weight Gain

Rob Kardashian is now vowing to shed his unwanted pounds by intensifying his exercise regimen with trainer Gunnar Peterson -- and it looks like the shame of bailing on Kim’s wedding is what pushed him to commit.

Every stuffed crust pizza has a silver lining.

Rob Kardashian is determined to drop his considerable gut after fleeing Kimye's wedding in fat shame ... vowing to hit the gym EVERY DAY until he sees his toes again, Rob's trainer tells TMZ.

Celeb trainer Gunnar Peterson tells us ... Rob texted him when he arrived back from Italy, where he bailed on Kimye's wedding because he felt too fat to pose for family photographs.

Gunnar says Rob's text was clear as crystal -- he wanted to hit the ground running ... literally ... posting up workouts every day this week, and continuing the intensity until the fat is gone.

As we reported, Rob's gym regimen hit a lull before Kim's wedding -- he worked out just a couple times a week -- but we're told Rob is now determined to get his old body back.

Gunnar tells us ... he will show Rob no mercy -- he'll endure a full hour of high-intensity full body exercises, cardio, resistance training ... the whole hog -- daily.

Gunnar tells us ... "Rob is locked and loaded" ... and NOT with cheeseburgers.

Casey Kasem's daughter -- an aspiring singer -- claims her weight problem went from bad to DEADLY ... all thanks to a quack wellness center that plied her with crappy weight loss meds ... and now she's suing.

Liberty Kasem filed the lawsuit against Dr. Edgar Guess of Beverly Hills Wellness Center, claiming she sought out his medical advice on losing weight while prepping for a music video shoot in 2012.

Kasem claims Guess gave her a treatment plan that included a new diet, vitamins, meds, and supplements. Six months later Kasem says she began to experience serious health problems.

One day, Kasem says she began to sweat profusely and vomit -- and exhibited other symptoms that caused her to fear for her life. Worst of all, she claims she hadn't lost any weight ... in fact, she'd GAINED.

As a result of the sudden health problems, Kasem claims she had to be hospitalized. She's suing Guess for medical bills, lost wages, and other unspecified damages.

The reason Rob Kardashian ditched his big sister Kim's wedding was simple ... he didn't want to take wedding pics because of his weight gain.

Sources close to the Kardashian clan tell TMZ ... Rob has become so insecure and depressed about his appearance ... he refused to be in the family wedding pics, despite his family's encouragement.

We're told the Kardashians were heartbroken and tried to support Rob, saying he doesn't look bad ... but he still wasn't down to pose

Rob Kardashian left Florence, Italy BEFORE his sister Kim got married to Kanye West ... and we're told it's because some major family drama went down.

Rob booked a flight from Florence to L.A late last night in a hurry ... and we're told he was in tears while desperately trying to secure a seat.

It's unclear what caused the Kardashian family beef -- but it had to be bad -- considering he missed out on not only his sisters wedding ... but one of the biggest celebrity events of the year.

We just shot Rob leaving LAX and he was clearly not in a talking mood.

Rob Kardashian says he's a fully grown man and doesn't need blogs to tell him he's fat.

Rob is scoffing at reports that he checked into fat camp and rehab to lose the lbs. He tweeted, "Then why am i still fat u fools??"

This photo of Rob leaving LAX for Kim's wedding in Paris Sunday triggered all the hubbub. He says, "I don't believe in rehab or therapy or anything of that sort."

As for losing the weight, he says, "I'm a grown man and will work on myself when i choose," adding, "I'm aware that I'm fat that def aint a surprise to me lol and my only therapy will be in the gym ..."

You got it, dumbbells?

We busted Rob Kardashian's chops for packing on the pounds -- but the guy IS trying to streamline before Kim's big day ... so we're now told.

Celebrity trainer Gunnar Peterson is flying to Paris to train Rob and Khloe Friday, Saturday, Sunday and Monday, he tells TMZ. Gunnar says Rob was training 5 times a week, but then slowed to twice a week 2 weeks ago because of other commitments.

Lamar Sally tells TMZ he did NOT want Sherri Shepherd to sign an amendment to their prenup ... despite the fact that TMZ has a copy of the amendment in question.

Lamar insists, "I did not want her to sign an amendment to our prenup." TMZ broke the story, at some point during the marriage, he presented Sherri with a document that required her, among other things, to say she would commit to staying thin. We're told she refused to sign it.

And we're told Sherri's current lawyer is in possession of the amendment in question.

Sherri Shepherd's estranged husband wanted her to sign a document promising that she would enjoy sex and not get fat ... TMZ has learned.

Sherri and Lamar Sally signed a prenup before they got hitched in 2011. We're told at some point after the wedding, Lamar wanted an amendment to the prenup, which included the following:

-- "I respect my husband's opinions and recognize him as the leader of our home. I will always speak well of my husband."

-- "I enjoy having sex with my husband. I crave intimacy with him and want to be uninhibited and free in our lovemaking."

-- "MY BODY IS IMPORTANT TO ME. I STRIVE TO MAINTAIN A HEALTHY BODY WEIGHT AND EXERCISE AT LEAST THREE TIMES A WEEK." (HIS emphasis)

-- "It is my joy to submit to my husband as a way to honor God."

Of course Sherri rejected the amendment.

Lamar filed for separation earlier this month ... Sherri has since filed for divorce. They're fighting over custody of their unborn baby via surrogate.

We contacted Lamar's lawyer ... so far no word back.

Connor Cruise hit the beach on the Mexican Riviera ... and was almost unrecognizable with dreadlocks and a chinstrap.

Tom's son is 19 now ... and looking much different from the kid we used to see around NYC and L.A.

Connor was down in Mexico for the grand opening of a Hard Rock Hotel and Casino -- and of course Cinco de Mayo.

CC's been blowing up as a DJ -- we shot him about a year ago after a gig in L.A. ... and the difference is amazing.

What isn't Gilbert Grape eating? Leonardo DiCaprio hit the beach last week with his 21-year-old supermodel girlfriend looking rounder than usual ... but the fact is, Leo's so rich and awesome, it doesn't matter.

Days before dancing like a weirdo at Coachella, Leo and his GF Toni Garrn vacationed in Bora Bora. While Toni removed her top and unleashed her boobs, Leo removed his top and unleashed his as well.

And no one cared ... because he's Leonardo DiCaprio.

Seriously, though. We're big fans.

Chumlee from "Pawn Stars" was quite the popular guy this weekend ... hanging with a bevy of beauties at Rehab pool at the Hard Rock Hotel in Las Vegas.

He's lost about 75 lbs. in the last year, and stars on a super popular reality show, but we're sure the girls were totally into him for his personality.

Fitness guru Cara Castronuova isn't very discriminating ... she'll go on a date with ANYONE who's willing to pay the asking price -- $10,000.

Cara -- an ex-trainer on "The Biggest Loser" -- tells TMZ she's raising money for her charity -- Knockout Obesity -- by offering a romantic evening in NYC with anyone who ponies up 10 grand.

The best part ... she's open to men and women.

Cara says she hopes to go on at least 3 dates so she can send 50 overweight kids to fat camp. She's moved by the heartbreaking letters she gets ... including one from a boy who told her he desperately wants to shed lbs so other kids will stop pinching his stomach.

So what do you get for your money? Cara says the date consists of dinner at a really nice place and then seeing the new Rocky musical on Broadway.

But here's the deal ... you have to pick up the tab for dinner ... and pay your own way to NYC. She'll take care of the theater tix.

Gerard Butler looks ready to do battle with Xerxes again, flashing his buff bod on Sydney's Bondi Beach yesterday.

THIS ... IS ... Atkins? Jenny Craig? More gym, less lunch?

Don't expect Megan Fox to wear mom jeans after popping out another kid last month ... because she already lost all the baby weight -- in 5 freaking weeks!

Fox ran some errands Friday in Los Angeles with her other son Noah -- after giving birth to Bodhi Ransom in February -- and one thing is clear, girl was looking GOOD.

Just like most plus size girls who lose a ton of weight ... Jennifer Hudson is dumping her main squeeze -- Weight Watchers.

Hudson says her time with the diet company has been life changing ... a total understatement ... she went from a size 16 to 6, losing 80 lbs, using the product -- and got pretty damn hot in the process.

J Hud linked up with W.W. in 2010 after giving birth the year before.

Company honchos say they assume she will continue using their products.

It sure seems to work better than pizza.