Aubrey O'Day
Aubrey O'Day dressed as a unicorn for Maxim's A-List Halloween Party. Michael Bejzain / Getty Images

Guests at the sexiest and scariest party in the world, the Official 2016 Maxim Halloween Party produced by Karma International Saturday at The Shrine Auditorium in Downtown Los Angeles, experienced hair-raising, elaborate haunted theme décor at every turn. Hollywood's best set and production designers created multiple graveyards and frightening haunted vignettes, which were creatively directed by Ryan Patterson.

Maxim Halloween Party
The spookiest and sexiest party of the year was held at The Shrine Auditorium in downtown Los Angeles. Michael Bejzain / Getty Images

Party-goers including Chris Brown, Aubrey O'Day, Karrueche Tran and Zac Efron encountered dozens of scare actors, themed performers, experiential production, and immersive lighting and sound. Sets from DJ Vice, who is known to perform at the hottest clubs across the country for sold-out audiences, Miami’s Lee Kalt, DJ CJ, Steve Castro all spun the best and most captivating mashup hits of our time.

Guests were also treated to the Best Damn Root Beer floats, delicious catering from The Bird’s Nest, the most beautiful models in the world brought to you by Pure Model Club, and energizing sips by Monster Energy. Desserts were provided by Belladonna Sweets, while specialty cocktails were provided by Ciroc Mango, Tequila Don Julio Blanco and Don Julio 1942.

All of the beautiful Maxim bottle service girls were decked out in stunning costumes courtesy of Foreplay.

Jean Watts
Jean Watts completely transformed herself with wild body paint at the Maxim Halloween party. Michael Bejzain / Getty Images

Famous faces in costume included Casper Smart, Ryan Guzman, Tara Reid, Tyson Beckford, "#RichKids" stars EJ Johnson and Dorothy Wang, DJ Pauly D, Angel Brinks, former "Real Housewives Of Beverly Hills" star Carlton Gebbia, Casper Smart, Shane West, Alyson Stoner, model Eva Marcelle, Gilles Marini, "Botched" star Paul Nassif, Romeo Miler, Alan Bersten, designer Michael Costello, Rachel McCord, Antje Utgaard, James Hinchcliffe Nick Bateman, Randy Jackson, Shaun Ross , Simon Rex and more.

Launch the slide show above to see more pics from the party.