Photo: Perez/Splash News

Halloween week is always fun in the rock world because it allows musicians to dress up even sillier than they normally do. This year’s gold medal goes to Mariah Carey and husband Nick Cannon, who went to their own party dressed as milk and cookies (hopefully with a concept album on the way). Other prizes this week go to Gwen Stefani (who dressed up as an egg) and Bruce Springsteen (who posed on his own website as, we assume, Pharoahe Monch). Click below for these shots plus the rest of the week’s biggest photos.

• Random Notes: Mariah Carey, Gwen Stefani, Bruce Springsteen and the Week in Rock

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