This is Mahalo's guide to 2007 celebrity Halloween costume photos.

• In Touch Weekly: Hollywood Does Halloween

• OK! Magazine: Special Report: Hollywood Halloween

• Hollywood.com: Dream Halloween 'Under the Big Top'

• USATODAY.com: No tricks, just celebrity treats at charity Halloween party

• TMZ.com: Chyna Bunny Wobbles All the Way Home

• TMZ.com: Who's the Scary Clown?

• X17 Online: More Halloween Hottness!

• X17 Online: "It's Halloween?"

• X17 Online: Jake & Reese Party It Up, Halloween Style!

• The Daily Mail: Hollywood goes Halloween: It's Paris Hilton in Wonderland

• PopSugar: Kate Hudson Brings Halloween to Hollywood

• Dlisted: Who's That Lady?

• PopSugar: Adrien Grenier Shows Off His, Um, Legs for Halloween

• PopSugar: Teri Has a Reason to Be Scary This Time of Year

• Hollywoodtuna: Heidi Klum Was A Scary Cat!!!

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