Sources
– https://www.britannica.com/biography/John-Legend
– https://www.encyclopedia.com/people/literature-and-arts/music-popular-and-jazz-biographies/john-legend
– http://www.musictory.com/music/John+Legend/Biography
– https://www.bmg.com/de/artist/john-legend
– https://www.allmusic.com/artist/john-legend-mn0000814387/biography
– https://usatoday30.usatoday.com/life/music/news/2005-07-28-legend-early-start_x.htm