51 Halloween Costumes You & Your BFF Will Completely Slay

16. Mermaid Man & Barnicle Boy:

17. Lizzy & Miranda McGuire:

Lizzie and Miranda @fearngriffin101 #bestfriendcostumes #heynowheynow #fearnistheone

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18. Daria & Jane from Daria:

Friends #daria #janelane #halloweencostume #friendcostumes #costume #halloween

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19. Tweedle Dee and Tweedle Dum from Alice in Wonderland