Alex and Sierra performed “Say Something” on The X Factor USA 2013 Top 6 Live Show, Wednesday night, December 4, 2013.
Here’s what the judges have to say about their performance.
Simon Cowell: My favorite performance of the season.
Paulina Rubio: I’m impressed.
Kelly Rowland: I thought I saw a performance on an awards show.
Demi Lovato: You two playing instruments was magical.
Top 6 Finalists performed two songs for America’s votes – one from their favorite diva artist, and the other, a stripped-down version of a song of their choice.