Blake Shelton made time for his main Valentine, wife Miranda Lambert, joining her mid-concert in Dayton, Ohio Friday. Blake made a surprise appearance, performing his new single “Sure Be Cool If You Did” with his wife. Miranda’sLocked & Reloaded tour mate Dierks Bentley gave a play-by-play of the performance on Twitter, posting, “Boom! @mirandalambert & @blakeshelton on stage together tonight in Dayton, Ohio. #surebecoolifyoudid”