Hef’s Health: Partiers Shocked by Playboy Founders Fragile Appearance | Bar Refaeli Strips Again… | Over Exposed: Are Miley’s Bra Snaps Really Just the Beginning? | Pop Tarts Sightings

Hef’s Health: Partiers Shocked by Playboy Founders Fragile Appearance

Hugh Hefner is still surrounded by bevies of busty beauties below the age of 25 — but is age finally catching up to the men’s magazine mogul?

The 83-year-old made a brief appearance at the Annual Kandyland Masquerade Ball at the iconic Mansion on Saturday night, but we’re told by numerous Playboy party regulars that while he appeared in good spirits, Hefner looked far from his normally alert and healthy self.

"He looked so old, like he had aged 10 years in the last month and was barely moving," said an insider, adding that Hef’s new number one Crystal held his hand and assisted him as she "slowly shuffled" along while his other lovers (the 19-year-old Shannon twins) marched ahead of the bunny brigade and reveled in the limelight.

"I have some aches and pains and I have had lower back problems since the '80s," Hefner told Tarts last year. "Too much time in bed rustling around with friends."

PHOTOS: Click here for photos of Hugh Hefner.

But are Hef’s health concerns a little more serious these days and has it got to do with the recent upheaval of the Girls Next Door?

"Things aren’t quite the same since Holly and the girls left," added our insider. "Hef loves all the new ones, but I think the transition really took its toll."

Still, Hefner's rep denied any health problems, telling Tarts that "Hef is perfectly fine."

"In the last three weeks, Hef has traveled to Italy to be a featured guest at the Sanremo Music Festival, attended the Playboy Jazz Festival press conference and hosted his usual weekend movie night events. He hasn’t missed a day of work or an hour of partying and he’s better and busier than ever. Party guests are misinformed."

Bar Refaeli Strips Again…

The latest edition of Sports Illustrated isn’t the only place to get a good look at Leonardo DiCaprio’s gorgeous girlfriend Bar Refaeli in next-to-no-clothes. The Israeli beauty recently finished a super sexy, yet sophisticated shoot for swim/sports label Hurley.

"I had a blast, it hardly felt like work! Yu Tsai is an amazing photographer and I trust him completely to make beautiful pictures," she told Tarts. "Between the concept, photographer and the Hurley clothes, it was a match made in heaven. ..." Awww.

Over Exposed: Are Miley’s Bra Snaps Really Just the Beginning?

Just because he’s married to Entertainment Tonight senior supervising producer Bonnie Tiegel, best-selling author Eliot Tiegel has no interest in protecting the not-so-inspirational behavior of today’s troublesome Tinseltowners.

In his latest book "Overexposed: The Price of Fame", Tiegel takes quite an in-depth look at the lives of Paris Hilton, Nicole Richie, Lindsay Lohan and Britney Spears (he even has a chapter dedicated to Miley Cyrus and elaborates on why her "bra shots are just the start of what is yet to come.")

Oddly enough, Cyrus was snapped again over the weekend bearing her cleavage while out jogging with underwear model beau Jason Gaston, but told Ryan Seacrest on KIIS-FM that it "was no big whoop."

What’s also interesting is that Tiegel told Tarts that the girls and their families featured in his book declined or didn’t respond to his requests to be interviewed or share their side of the story — well, with the exception of Michel Lohan that is. He slams ex-wife Dina and insists that Lindsay’s hit song "Father & Daughter" was a passionate song about how she missed him, but Dina got together with the producers and turned into a song bashing him. Meow! But a book about celebs behaving badly — always entertaining, right?

Pop Tarts Sightings

Megan Fox was spotted at Crumbs Bakery in Beverly Hills last Tuesday where she ordered 2 cupcakes — cappuccino and red velvet.

Transformers babe Rachael Taylor and The City starlet Whitney Port were seen shopping up a storm at Alice & Olivia on Robertson Boulevard in West Hollywood on Friday.

Ed Westwick and Jessica Szohr were spotted on Saturday night at STK in Los Angeles. Although they came in a large group, we're told the Gossip Girl twosome looked like more than just friends as they cuddled up. Also seen at the trendy steakhouse was David Spade (flirting with the girls at the table beside him of course) and Grey's Anatomy starlet Sara Ramirez enjoying a ladies night out.

Dean Cain and his mom Sharon were spotted drinking champagne and rocking out to guitarist Dave Navarro at Liquid Sky Bar during Aspen Peak Magazine’s Aspen Celebrity Downhill event on Friday. Rocker Cisco Adler jokingly invited Cain’s mom back to his house while performing at the gala on Saturday. Chad Lowe was also seen chowing down on burgers and sweet potato fries while listening to Adler perform.

Al Pacino had lunch with his young daughter at Beverly Hills staple Porta Via on Sunday, later The Hills cast descended upon the classic cafe to film an episode for the upcoming season.

On Sunday, West Hollywood's Murano Restaurant & Lounge hosted the "6th Annual Love Lounge" to benefit Lambda Legal. Approximately 250 partygoers wined, dined and danced including blogger Perez Hilton who brought Emmy Rossum along as his date.

Ashley Tisdale was spotted inside the Westfield Century City Solstice Sunglasses Boutique in L.A on Monday on the prowl for Marc Jacobs aviator sunglasses.

The Hills starlet Stephanie Pratt seen slurping away at L.A frozen yogurt hotspot Yogen Fruz on Tuesday, gushing over the Haute Betts jewels she's just picked out.

Terminator: The Sarah Connor Chronicles star Leven Rambin seen picking out products at the Napoleon Perdis store on Hollywood Boulevard on Monday.

On Monday night Katie Price (aka Jordan) & Peter Andre and their family had dinner at Simon at Palms Place in Vegas while filming the 6th season of their reality show "Katie & Peter The Next Chapter Stateside." They are also filmed in a sky villa inside the fantasy tower.

Jessica Alba lunched with friends on Tuesday at the uber-exclusive Polo Lounge inside the Beverly Hills Hotel.

West Hollywood hotspot Apple Lounge was the place to be on Tuesday night for some star-spotting. Hayden Panettiere debuted a new short blonde bob, Chris Evans celebrated a friend's birthday with a bottle of Grey Goose and a round of Patron shots, L.A. Laker Lamar Odom chilled out after the game, Josh Hartnett laid low with a beer and a buddy while David Arquette partied with pal Emile Hirsch.

Prior to hitting the club scene, Hayden Panettiere was spied on the back patio of Koi Los Angeles enjoying crispy rice rolls while musician Michael Buble (who is a regular at the restaurant) noshed nearby and told staff just to let him know when they're sick of him coming.

Old-school rapper Vanilla Ice partied and performed at PURE in Las Vegas on Wednesday night.

Michelle Trachtenberg and Olivia Palermo partied with Old Navy's "Supermodelquins" at New York City's 1OAK on Tuesday night to celebrate the launch of Old Navy's new advertising campaign.

Claire Danes lunched at Portia Via in Beverly Hills on Wednesday.