Hugh Hefner says the hearsay that his girlfriends Holly Madison, Bridget Marquardt and Kendra Wilkinson are ready to move on is all made up.

"It’s all rumors without question. We have just completed our fifth season (of "Girls Next Door") and we’re all still together and have just signed on to a sixth season, which we start filming in the new year," Hefner said at last week's FOX REALLY Awards Show taping in Hollywood. "There may be some transitions to the relationships though, we’ll see."

But despite denials from the Playboy camp and the girlfriends themselves, a close insider told Pop Tarts that the "transitions" may very well involve a fresh set of faces.

"There have been a lot of new girls on the scene and big changes are happening," said our source. "Holly, Bridget and Kendra have made no secret of the fact they want to get married and have babies and they aren't getting any younger."

So does Hef have any regrets in exposing (what was once) his very mysterious mansion to the world through television?

"No regrets at all," he responded. "We’re overwhelmed by the fan reaction and could not be happier. Regardless of what happens, it's been great."

Speaking of Hef's leading ladies, 23-year-old Kendra was spotted by Pop Tarts spies letting loose at Aura Nightclub in The Bahamas, along with fellow Playmate Brittany Binger. We're told Wilkinson kept the crowd pumped all night and was acting like "a single girl."

Selena Gomez Flirts With Cody Linley?

Word on the street is that Disney darling Selena Gomez is going out with teen music sensation Nick Jonas, but Pop Tarts spies spotted Gomez sneaking around to watch Cody Linley on “Dancing With the Stars” the week before last.

Gomez and Linley were caught being all flirty and playful after his dancing performance and she even hung around The Grove while he played guitar for his fans.

And although Gomez didn't make a cameo at her Disney "friend" Miley Cyrus' Sweet 16 on Sunday evening, she was putting her star status to good use by stepping out in Los Angeles for "Target Presents Variety's Power of Youth" to raise funds for St. Jude's Children Research Hospital.

Just last weekend, Gomez also turned up in support of the AmberWatch Foundation Youth Coalition Fun Faire to educate youngsters on how to stay safe. But even though she comes across as Miss Perfect, Gomez insists she has messed up.

"Of course I've done things wrong and I am sure I will make many more mistakes," she recently told Pop Tarts while discussing her status as a tween role model. "But I just hope I can keep those mistakes from my fans."

Hiltons Get Hot, Mariah and Nick Get Lovey

Sin City was swarming with stars over the weekend as Nicky Hilton celebrated her 25th birthday at PURE alongside beau Dave Katzenberg, sister Paris Hilton, her parents and rocker Benji Madden.

Paris presented her sweet sibling with a three-tier cake and (as per usual) ensured she was the center-of-attention by getting on the mic.

Across the strip, Mariah Carey and her hubby Nick Cannon were getting their groove on at posh party place The Bank. We're told that the Tinseltown twosome refused to leave one another's side and a few fans were even escorted out of the Bellagio after jumping on slot machines to take pics of the happy couple entering the club.

But after a night of play, it was all work on Sunday for Mr. and Mrs. Cannon as Mariah filmed her upcoming music video "I Stay in Love," which was directed by Nick.

Seal Going Back to Basics

Last year, Seal released "System," and although the album didn't quite live up to expectations, the singing sensation is back in the recording studio — but this time playing it safe with some historical hits.

"I am doing soul album which is an album of R&B classics," Seal told Pop Tarts at last week's 60th Anniversary of the State of Israel dinner, held at Hollywood's Paramount Studios. "Songs like “It’s a Man’s World" etc. and I’m filming the video for it tonight."

But judging by his sly smile, we think his supermodel wife Heidi Klum may very well be back for another singing cameo.

"You will have to wait and find out, it's possible," Seal responded.

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