Ashlee Simpson Gives Pete Wentz A Lapdance, Cee-Lo Moons, T.I. Rocks JD’s Bash: It’s The VMA Party Report!

Stars party into the wee hours as Vegas does the VMAs proud.

Fall Out Boy‘s Pete Wentz had more than a VMA win to smile about Sunday night. As the band’s Belvedere Suite party in the Fantasy Tower at the Palms Casino Resort got underway in the wee hours, Ashlee Simpson gave Pete a little treat — and it wasn’t from the table of free breakfast goodies. Though they were roped off in the small V.I.P. section of the party (which Perez Hilton crashed around 3 a.m.), the couple weren’t exactly hidden from view when they gave new meaning to displays of public affection. We tried not to stare, but it’s not often you see near-expert lap dances from non-pros. It was actually somewhat instructional, and so expertly done that it made us wonder — did Ashlee take lessons? Somehow, Pete managed to DJ for awhile after that. Also caught in the act at the party: Cee-Lo mooning people (he dove into the Palms pool with all his clothes on later), and Mario Lopez apparently in an argument with a girl who stormed out. …

(Check out photos of Diddy, Britney, Ashlee, Pamela Anderson, Kanye, Ludacris and many more tearing up the VMA party scene in Vegas — right here!)

Minutes away at Tao, Jermaine Dupri, Nelly and Travis Barker hosted a party where famous friends such as Lil Wayne, Robin Thicke, MIMS, DJ Drama, Shar Jackson, Doug E. Fresh, Fonzworth Bentley, and the Clipse kept coming in all night.

“Hey DJ, I want you to play the song that’s gonna move this building!” JD said into the mic. He had a VIP section with Nelly, and both superstars had their girlfriends — Janet Jackson and Ashanti, respectively — with them.

“I’m not even gonna tell you what to play,” Dupri continued. “You play the hottest sh– right now.”

On cue: “I get money, I-I get money…” The turntablist dropped 50 Cent’s “I Get Money” to a raucous reaction. “OK DJ!” Dupri said a few minutes later. “I want you to drop the second hottest record right now!”

On cue again: “La, la, la, wait till I get my money right” as the DJ dropped Kanye West’s “Can’t Tell Me Nothing.”

Later, it was time for an impromptu concert. T.I., whose own VIP section was in back of Dupri’s, got on the mic and performed “ASAP,” Bring ‘Em Out” and “Big Things Poppin’.” Not to be outdone, the one-man walking party central himself, Jamie Foxx, got on the mic and did the chorus to “Gold Digger.” Nelly also got on the mic in the VIP section, and rocked his new single “Wadsyaname.” Alicia Keys and Doug E. Fresh took the mic as well. …

Over at the Hard Rock Hotel’s Body English (definitely one of the most poppin’ spots all VMA weekend), birthday boy Swizz Beatz would have gladly accepted a rendition of “Happy Birthday” (the Stevie Wonder version) from his good friend Eve, but the former pitbull in a skirt did give Swizzy a little something extra at his party. Eve starred in her own mini-concert to get the festivities off to a running start. Akon, Alicia Keys, the Clipse (they were making the rounds last night, weren’t they?), Pharrell Williams, Angie Stone and Taye Diggs were just some who came out to congratulate “The Monster” on another year. Swizz and friends didn’t hold court in a VIP section — they stayed on an elevated dance floor. Swizz himself got on the mic and rapped along with some of the records the DJs spun, such as “Money in the Bank” and “Top Down.” Funny thing, though: At certain points in the party, people were literally jumping up and down, but it wasn’t to one of his signature productions like “Get Me Bodied” or “Money, Cash, Hoes.” He was hyping the crowd off of dance music, like Daft Punk’s “One More Time.”

“It’s showtime! Push it up, push it up!” Swizz yelled as people bounced into the air. Some of Swizz’s VIP friends in the balcony started throwing wads of dollar bills to the dancefloor. …

Official VMA maestro Timbaland held court over at Jet in the Mirage, where he was joined by Keri Hilson and Yung Berg, who came through with a mini entourage. The multi-platinum producer took the mic and held court, telling the DJ which tracks to play — which were mostly his own! Of course, they were all bangin’, from Justin’s “SexyBack” to Nelly Furtado’s “Say It Right,” the atmosphere felt like the show finale all over again. …

“It’s showtime! It’s rain time!” Swizz yelled on the mic. One reveler in the balcony got so excited, he lit up two sparklers like it was the Fourth of July and started waving them in the air. …

Elsewhere, in a considerably less snooty, velvet rope-heavy setting, deep in the heart of so-called “Old Vegas,” in a little dive called Beauty Bar with horrifying bathrooms and free cans of Miller Lite, Video of the Year nominees Justice and Kanye West’s DJ A-Trak threw an amazingly spare soiree that was short on passed hors d’ouevres (and by “short on,” we mean nonexistent,) but long on sweaty grinding and fist-pumping electro. Taking the tiny stage just after 1:30 a.m., flanked by a posse that included artist So Me (who created the animation for the nominated “D.A.N.C.E.” clip) and just about everyone associated with the Ed Banger record label, the dynamic duo of Justice threw “D.A.N.C.E.” onto the turntables and began to systematically chop it up and break it down to its most funky elements, much to the enjoyment of blissed-out guests like Mark Ronson and the guys from Peter Bjorn and John, not to mention every single hipster in the house. Flipping expertly between pounding house and cheekier exercises in grimey bass, their set was gleefully lo-fi — just two turntables and the occasional graphic projected onto the brick walls — yet perfectly matched with the dingy couches and spare strands of Christmas lights that accounted for all of the B-Bar’s decoration. They also managed to rock as hard as anything else we saw this week.

And when they wrapped things up with a remix of “D.A.N.C.E.” — one that managed to work in portions of 50 Cent’s banging “I Get Money” — that was followed by a pretty-much-verbatim rendition of the Pixies’ “Where Is My Mind,” it was a little bit surreal and a whole lot of fun. You know, how Vegas is supposed to be. …

So are the VMAs hot or what?! But there’s much more Vegas riches to share: For a wealth of updates and info on performers, presenters and voting, check out www.VMA.MTV.com. For reports, photos, video and much, much more from previous VMAs, dive into the VMA archives.