Question: all the coaches that have been on the voice?
Answer: Blake Shelton. Seasons 1-Present. Kelly Clarkson. Seasons 14-Present. ...  John Legend. Seasons 16-Present. ...  Adam Levine. Seasons 1-16. ...  Pharrell Williams. Seasons 7-10. ...  Alicia Keys. Seasons 11-12, 14. ...  Nick Jonas. Season 18. ...  Christina Aguilera. Seasons 1-3, 5, 8, 10. ...