On last night's A Very Grammy Christmas on CBS, Ariana Grande and Big Sean stole the show with their super sweet first-ever performance as a couple. The pair were all hand-holding, melisma and extremely prolonged eye contact as they duetted on "Big Mistake," one of the crucial cuts from Grande's Grammy-nominated album My Everything. Also performing was one-time FADER cover star Sam Smith, who just scored a huge six Grammy nominations himself, becoming the first male artist in 34 years to earn nods in all the "big four" categories (Album, Record and Song of the Year and Best New Artist). Smith bowled over the audience with his update of "Have Yourself A Merry Little Christmas," which you can watch the official video for below; elsewhere, Grande got in on the festive action too with a performance of her Christmas single "Santa Tell Me."
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