Hot Vegas

As TMZ first reported, the Hoff and GF Hayley got into it in their hotel room at the Wynn ... to the point where Hayley called for security.

But the couple put on their best face and made their way down to Blush ... where the Hoff celebrated his 59th birthday ... as if nothing ever happened.

Earlier in the day, Hoff and Hayley hung out by the pool where he put on his "Baywatch" best, much to the delight of the crowd.

Hasselhoff was at the Wynn to celebrate his 59th birthday. His friends were throwing the bash for him at Blush, inside the hotel.

But early this evening, Hasselhoff's girlfriend called for security and one source says she appeared to have been in some sort of distress.

Security came ... and for a while there was some question as to whether David would make it to his own party, But now we're told David will indeed show up -- he's scheduled to walk the red carpet with his girlfriend at 11 PM.

Josh Lewis repossessed the tatas of a woman (consensually, we're told) at Pure nightclub -- and based on the picture, he couldn't be happier to be alive.

TMZ has learned ... Tyson and his wife Lakiha invited hundreds of friends to a joint birthday party they threw for each other at the M Resort ... but the b-day party was merely a cover for a secret vow renewal.

After the guests arrived to the party, the couple disappeared ... only to re-emerge behind a massive curtain ... which dropped to reveal both Mike and Lahika dressed in wedding outfits.

With the crowd completely surprised, the couple proceeded to renew their vows in a traditional Muslim ceremony.

We're told the two decided to do the big "wedding" party this time around because they skipped out on a celebration when they were secretly married at a small Vegas chapel back in 2009 ... two weeks after Mike's 4-year-old daughter passed away.

Sources tell us the party was AWESOME -- guests had their choice of a steak or chicken entree ... and then they partied it up in the hotel's ballroom with a live band.

Congrats!

As TMZ first reported, Pauly was one of only three cast members not sequestered at the "Jersey Shore" house in Seaside Heights, NJ -- he was allowed to skip out so he could work this gig.

Winner.

Sources close to Harris tell TMZ ... Heidi reached out to her shortly after the breakup with Hef to offer her moral support. Bottle blondes need to stick together!

The pair decided to spend what would have been Crystal's wedding day in Las Vegas. They couldn't just go to Sin City on the down low -- instead they are hosting a party at WET REPUBLIC pool at the MGM Grand Hotel & Casino.

Sources close to the club tell us -- "Idol" Season 5 finalist Ace Young visited the Chippendales at the Rio in Vegas recently ... and was SUPER interested in donning the famous bow tie and shirt cuffs.

According to sources, Young paid Chipps a visit to hang out with Timmons -- and to see how the whole guest-hosting thing works.

So far, there's no deal in place -- but it looks promising.

We caught up with Rachel last night at the Azure Luxury Pool at the Palazzo in Las Vegas -- where she told us ... when the Arnold thing broke, she was contacted by a "very high profile journalist" who claimed they heard she had a "long-lasting" affair with the Governator.

She told us, "I've never met Arnold. Never even thought about him. I don't like his movies, I'm not even a fan."