Molly Sims arrives at the Casamigos Tequila halloween party in Hollywood.
Julianne Hough dresses up as Crazy Eyes from 'Orange is the New Black'.
Isla Fisher and Sacha Baron Cohen
Isla Fisher and husband Sacha Baron Cohen dress up in animal costumes.
Tim Allen dresses up as a football player.
Vanessa Hudgens dressea up as an angel.
David Spade dresses up like photographer Terry Richardson.
Rande Gerber and Cindy Crawford
Cindy Crawford and her husband Rande Gerber dress as Slash and Axl Rose.
Jeremy Piven wears an eye patch.
Sean Penn leaves the Halloween Party wearing a devil mask.
Stephanie Pratt wears a genie costume.
John Stamos goes to the party as a devil.
Leonardo DiCaprio is seen leaving the private Halloween party dressed in a black gothic outfit.
Kate Upton attends the costume party in Beverly Hills.
Alessandra Ambrosio is photographed leaving the Halloween party.
Michelle Trachtenberg is spooky.