Fifth Harmony sang "Impossible" half in English, and half in Spanish for their mentor's choice song. As you'll remember, the girls sang it at Judges' Houses. Their mentor, Simon Cowell, said he thought it was the right choice because it "was a reminder why I fell in love with you in the first place." (It's hard to say if it was the best version of the song, considering X Factor UK winner James Arthur just released this as his first single...) For her part, Britney Spears said she doubts they'll be here next week. Thoughts?