Alex & Sierra had a lot to "Say" tonight. They went from "Say My Name" to "Say Something," a beautiful song by A Great Big World. On a smoke-filled stage with candles, the couple seemed totally in their element with this "Unplugged" theme. We got to see Sierra on the piano for the first time, and Alex was back on his guitar. Early on in the performance, the audience cheered loudly, and Simon had such a confident look on his face! Sierra's fingers were trembling, but her voice sure didn't waver.