When I walked out on stage, I felt like I blacked out and came to right when I finished the song. … WhenCarson [Daly, "The Voice" host] came up and talked to me, I thought, "I survived! I did it." I didn't know how I sounded. I came off stage, went to the bathroom, splashed water on my face and sat there. I came back to the backroom, and one of the girls said, "Heartless is trending!" And I didn't know what that was because I wasn't on Twitter, but she said it was a good thing.