Celebrities Do Halloween! Christina Aguilera, Kim Kardashian, Jessica Alba, More

Check out some snaps from last night's parties

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The stars have been out in force this weekend in their best Halloween costumes.

From Tom Daley to Jessica Alba, famous faces all around the world have taken the opportunity to don exciting costumes to mark the big day... which isn't actually until Wednesday.

Liam Payne was Batman, Daley was a skeleton, Alba was Mrs Incredible, and Kim Kardashian went blonde for her role as a mermaid.

Jedward partied the night away with their BFF Tara Reid - though the only ounce of costume we can see in their pic is a sailor hat. Hmm.

Take a look at the best of the bunch below.

PHOTOS: Halloween costume fest...

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Tom Daley seemed to gain a lot of weight for Halloween (WENN)