Question: Who are the duo from the show "Britain's Got Talent" that recorded the song composed by Franz Xaver on their second studio album?
Sentence (from "Silent Night"): "Silent Night" (German: "Stille Nacht, heilige Nacht" ) is a popular Christmas carol, composed in 1818 by Franz Xaver Gruber to lyrics by Joseph Mohr in the small town of Oberndorf bei Salzburg, Austria.
Relevant evidence: Yes