Dagny Norvoll Sandvik is a Norwegian singer, known as "Dagny" who had success with her debut single "Backbeat". The acoustic version of the song was featured on Grey's Anatomy in the episode "True Colors". Dagny is the daughter of the vocalist Marit Sandvik and the jazz musician Øystein Norvoll. She has had big success on Spotify and has signed for Universal Music. Rob Stevenson said of her, "...... show more