Holly Madison & Angel: Harry Potter Premiere

Celebrating the release of “Harry Potter and the Deathly Hallows,” Holly Madison was spotted at the midnight premiere at the Brenden Theaters in Las Vegas last night (November 18).

The former “Girls Next Door” babe was joined by Angel Porrino, and both ladies were fully dressed in themed costumes as they hammed it up at the Palms Resort.

Credit: Celebrity Gossip

AnnaLynne McCord: Fallout New Vegas Launch

AnnaLynne McCord arrives at the launch party for the video game "Fallout: New Vegas" at the Rain Nightclub inside the Palms Casino Resort October 16, 2010 in Las Vegas, Nevada.

Credit: Zimbio

Photos by Isaac Brekken/Getty Images North America

Jayde Nicole: PMOY 2010 Red Carpet

Jayde Nicole arrives at a party to introduce model Hope Dworaczyk as the Playboy's Playmate of the Year at The Palms Casino Resort on May 15, 2010 in Las Vegas, Nevada.

Credit: Celebrity Gossip

Later in the night, Jayde met up with friends including, Josh Strickland, Shannon James, Angel Porrino, Joyce Bonelli, and Kelly Carrington at XS Nightclub.

Credit: XS Nightclub

Audrina & Ryan: AG Adriano Goldschmied Party

Ryan Cabrera and Audrina Patridge attend the AG Adriano Goldschmied party at Rain Nightclub at The Palms Casino Resort on February 16, 2010 in Las Vegas, Nevada.

OfficialAudrina "vegasss!!!! gonna be a very eventful night!!! so excited to see the foo fighters" about 13 hours ago from mobile web

Credit: Wire Image