No. 8 Alicia Keys
If there is a Carole King or Roberta Flack of the 2000s, it’s the piano-playing singer from Hell’s Kitchen. A little hip-hop, a little R&B — with an image and sound that isn’t out of place on adult contemporary playlists, A. Keys is one of the most iconic musicians of the last decade. Only Beyoncé has been more inescapable.