‘Glee’ season 4 spoilers: Could ‘The Voice’ coach Adam Levine appear?

Adam Levine already has a role on one Ryan Murphy show in “American Horror Story” — so considering his musical talents, could the Maroon 5 frontman (and coach on “The Voice”) end up appearing on “Glee” sometime soon? On paper, it certainly makes some sense, but that doesn’t mean that anything is set in stone […]