WILL FERRELL just scored his first HIT SONG. "Husavik", from his new Netflix movie "Eurovison Song Contest: The Story of Fire Saga", just debuted at #16 on the Billboard Digital Song Sales chart with 8,000 downloads in the U.S. In the movie, Will and his co-star RACHEL MCADAMS sing the song.But in real life, most of the female vocals come from a Swedish singer named Molly Sanden. . . who calls herself MY MARIANNE. Rachel's vocals are mixed in, but apparently not enough to give her a credit on the song. The "Eurovision" soundtrack debuted at #5 on the Soundtracks chart, and #170 on the Billboard 200.