Watch Kelly Clarkson and Jimmy Fallon Sing the History of Duets

"“I swore I’d never sing this again… but tonight, I had to.” Kelly Clarkson’s voice cracked as the first chords played — not a performance, but a confession. “This song once saved me… but I let it go, until I realized I still needed it.” No longer about waiting to be saved, she sang of choosing herself, loving herself, breaking and rebuilding. “I take care of me… because I love me,” she cried, tears falling. Even Jelly Roll stood frozen side stage, head bowed, hands clenched, tears in his eyes.