Liv Tyler was a lovely Cleopatra and her son, Milo, 4, was an adorable bat. Her ex and son’s father, Royston Langdon, went as a mummy.
(Fame Pictures)

Mariah and Nick Carey were angels. Sure beats Ike and Tina Turner while remaining uncreative.
(Diane Cohen/Fame Pictures)

Christina Aguilera and her son Max went trick or treating in Brentwood in skeleton costumes.
(Fame Pictures)

Anthony Keidis and his son Everly Bear, 2, were so cute in LA in matching Eddie Munster costumes!
(Fame Pictures)

Nicky and Kathy Hilton had some pretty vanilla costumes. Nicky went as Audrey Hepburn in Breakfast at Tiffanys and her mom was a sexy cop.
(WENN.com)

Paris Hilton was a wasted showgirl. Hope she wasn’t driving!
(VAH/Fame Pictures)

Kyle MacLachlan wore a shirt with food all over it and the word “Dad” spelled out.
(VAH/Fame Pictures)

Gwen Stefani was the cowgirl from Toy Story 2 while her sons Zuma, 1, and Kingston, 3, were dinosaurs.
(Fame Pictures)

Annie Leibovitz’s costume is as confusing as her finances.
(Fame Pictures)

Jeremy Sisto’s newborn son, Charlie, was a little hippie in NY.
(Fame Pictures)

Holly Madison was the Queen of Hearts in Las Vegas
(WENN.com)

Annalynne McCord and her sisters shopped at Girls’s Costume Warehouse.
(WENN.com)

Twilight’s Kellan Lutz and Ashley Greene were Robin and some kind of sexy peacock at a party in Vegas. What kind of costume is that?
(WENN.com)

Sam Trammell from True Blood was a viking sorcerer at the same party in Vegas.
(WENN.com)

Bette Midler was a fabulous creature at her Hulaween Gala in NY.
(Diane Cohen/Fame Pictures)

I have no idea what Martha Stewart is wearing at Midler’s party, but it looks awesome.
(Diane Cohen/Fame Pictures)

Nina Dobrev and Kayla Ewell from The Vampire Diaries were a sexy pirate and sexy sailor at Heidi Klum’s party.
(WENN.com)

Perez Hilton dressed as Lady Gaga for Klum’s party.
(WENN.com)

Kelly Osbourne and her fiance Luke Worrall were bacon and eggs.
(WENN.com)

Katie Price and Alex Reid were trannies in London.
(BIG PICTURES/bauergriffinonline.com)

Derek Hough was Superman at Heidi and Seal’s party.
(WENN.com)

Jessica Alba and Cash Warren were Dora & Diego (Thanks Toni!)
(WENN.com)

Heidi Klum and Seal dressed as crows for their yearly Halloween party.
(INFPhoto.com; WENN.com)