Mariah Carey & Nick Cannon celebrate Halloween with the kids (Photos)

Mariah Carey and ex-husband Nick Cannon put on a united front for Halloween.While she dressed as a witch,Cannon wore a dark green sweatshirt to complement his Hulk mask. Twins Monroe and Moroccan, 4, dressed as Batgirl and Batman, respectively.

 Meanwhile, Carey’s new boyfriend, James Packer, attended the Halloween event which held at her $15m Beverly Hills estate..