The "I Won't Give Up" singer -- who did an acoustic version of "Empire State of Mind" with Ed Sheeran at the Jingle Ball Viewing Party -- told Us he was at the event as both a fan and a performer. "I'm excited to see Ne-Yo perform. I've been a fan of his as a songwriter for a long time," he said. "And I love Taylor [Swift]. She always has surprises and such a great stage presence. Tonight's a really cool event."