Williams reported to work Tuesday in his Halloween costume – Alvin from "Alvin and the Chipmunks." Well, Williams is a very, very large chipmunk, but he nails the goofball, high-energy personality.

Mariah Carey and her son Moroccan dressed up as Alvin and the Chipmunks for Halloween. In photos posted by Carey's 13-year-old son Moroccan, the songstress donned furry ears and Alvin's red outfit ...

On Thursday, Nov. 7, the music legend shared a joint carousel post that featured snaps of her and 13-year-old son Moroccan dressed up for Halloween ... Alvin from the 2007 movie Alvin and the ...

The entertaining antics of Alvin and the Chipmunks are ... This double-feature of direct-to-DVD Halloween-themed stories features the Chipmunks meeting two of the most iconic horror creatures ...

On Thursday, Nov. 7, the music legend shared a joint carousel post that featured snaps of her and 13-year-old son Moroccan dressed up for Halloween. While Carey, 55, was dressed as Alvin from the 2007 ...