Question: coaches that have been on the voice?
Answer: Blake Shelton has been the only coach for all seasons. Others along the way for the Emmy-winning reality program have been Christina Aguilera, Kelly Clarkson, Miley Cyrus, Cee-Lo Green, Jennifer Hudson, Nick Jonas, Alicia Keys, John Legend, Adam Levine, Shakira, Gwen Stefani, Usher and Pharrell Williams.