On Sunday night, Gretchen Rossi celebrated her 33rd birthday at Lavo at the Palazzo during a special Halloween edition of Vampire Vice Sundays.

With Paul Oakenfold spinning on the Strip for the first time in more than three years, Scott Disick dressed to bless and $20,000 in cash and prizes for the most elaborate costumes, Chateau Nightclub & Gardens was the center of Halloween celebrations in Las Vegas last night.

Last night, Tryst Nightclub at Wynn Las Vegas hosted a heaven meets hell themed party that invited angelic beauties and sinful devils to celebrate All Hallows’ Eve alongside blonde bombshell Angel Porrino.

Sam Trammell from “True Blood” kicked off Halloween weekend on Saturday by hosting the party at Vanity Nightclub at Hard Rock Hotel.

Las Vegas’ sexiest ghouls and goblins came out to Studio 54 at the MGM Grand last night as Holly Madison hosted her third annual Hollyween, complete with a sexiest costume competition and special performance by “Peepshow” and E!’s ”Holly’s World” cast mate Josh Strickland.

On Saturday night, celebrity couple Ice-T and Coco, from E! Network’s hit reality show “Ice Loves Coco” hosted the ultimate Halloween Player’s Ball at LAX Nightclub inside the Luxor.

On Saturday night, Heidi Klum brought her legendary Halloween party, in its 12th year, to Las Vegas and Tao Nightclub at the Venetian for the first time. Upon landing she asked her driver to take her to see the billboard for the party and she posed in front of it and tweeted the photo.

Alex Rodriguez of the New York Yankees was spotted at Marquee Nightclub at the Cosmopolitan of Las Vegas on Saturday night.

Scott Disick of “Keeping Up with the Kardashians,” Bridget Marquardt of “Girls Next Door,” UFC fighter Quinton “Rampage” Jackson and legendary deejay Paul Oakenfold enjoyed a Halloween weekend dinner at Sugar Factory at Paris Las Vegas last night.