The 30 Best Celebrity Halloween Costumes of All Time

As Marilyn Monroe on The Tonight Show with Jay Leno on Halloween.

As Gomez Addams from The Addams Family at a Halloween fundraising party for the Children Affected by Aids Foundation.

As a mermaid at her Halloween party in London.

As the Playboy bunny at the Halloween Mansion Party hosted by Hayley Duff.

As Marie Antoinette at the Browns Focus Halloween party.

As The Addams Family’s Morticia Addams, with then-husband Jamie Hince as Gomez Addams.

As Frozen’s Olaf and Elsa during the 1989 World Tour, for a surprise Halloween performance of “Let It Go.”

As Edward Scissorhands from Tim Burton’s 1990 film of the same name.

As Pig Face from The Twilight Zone at her Halloween party.

As “West Worms.”

As Medusa.

As Dorothy from The Wizard of Oz for his “Harryween” Love on Tour show.

As the Bride of Frankenstein from the 1935 film, in custom Jean Paul Gaultier by Glenn Martens.

As Marge Simpson.

As Lady Gaga at the 2009 VMAs.

As Serena and Venus Williams from their 2000 “Got Milk?” campaign.

As Sugar and Spice from Batman Forever (1995).

As a Tim Burton flower from the 2010 Alice in Wonderland film.

As Rosemary (Kravitz) and Rosemary’s baby (Tatum) from Rosemary’s Baby, at Kendall Jenner’s Halloween party.