Gwen Stefani, Blake Shelton — Adam Levine Busts their Chops on ‘The Voice’ (VIDEO)

[[tmz:video id=”0_9ltxrkuj”]] Blake Shelton gave Adam Levine an opening on “The Voice” Monday night, and Adam seized the moment by poking fun at Blake’s relationship with Gwen Stefani. Here’s the context … Gwen was Craig Wayne Boyd’s coach during…

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