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Canadian rock star Bryan Adams, best known for his wildly successful party-rock anthems and love ballads, has dropped a protest song for Canada Day, declaring: “We’ll never be the 51st state.” The song, clocking in at a tight 2:16, was released on streaming platforms Wednesday. It celebrates the shared history and friendship of Canada and the U.S., but vows he’ll fight for his country if need be. “Maybe you’ve forgotten; Maybe you just don’t care; But we always stood beside you; For that liberty we share,” Adams sings in the song, 51st State.” “You can push us to the brink; But where...