How do you finish off a hot Miami night like MTV's Video Music Awards? With a huge party, of course, and "Extra's" got your ticket inside Sunday night's biggest post-parties.

Over at the Usher-Motorola party, fireworks sounded and the crowd danced, clowned around and stared at Lil' Kim's very revealing outfit. But all of the guests of the big winner seemed to have a ball.

P. Diddy hosted one of the biggest VMA after parties, where the hip-hop mogul, who sported a Mohawk, walked in with Bruce Willis. So are the pair now friends? "We don't even know each other like that," P. Diddy insisted. "We hardly know each other," Willis joked. "I'm just trying to jump start my pathetic career hanging with some young kids."

Inside the party, Ashley and Mary-Kate Olsen were having a blast.

Over at the Simpson soirée, Ashlee was quick to tell us her favorite part of the evening: "I saw Bruce Willis dancing to 'Lean Back,' that was probably my highlight." But Jessica told us hers: "It was so amazing to just look out and see Beyoncé and Jay-Z."

But moments later, as Jessica was giving another interview, the crowd appeared to rush the door, and security used pepper spray to keep everyone back. Ashlee and Jessica were frazzled, but unhurt.

Meanwhile, Outkast celebrated their big night with Missy Elliott. We also met up with newlyweds Carmen Electra and Dave Navarro, who offered us a ride in their limo to the Ocean Drive party.

So from one end of Miami to the other, the stars were partying to their hearts content all night long.