Are you ready for a major reunion on The Voice? It’s going to be one massive party on Monday, April 27, because three former coaches are returning to the NBC singing competition series to help out the contestants! That’s right, not only are we going to get to see Adam Levine, Blake Shelton, Pharrell Williams and Christina Aguilera continue to do their thing as the coaches during the two-hour episode on Monday, they’re going to be joined by Gwen Stefani, Usher and CeeLo Green, too! E! News can exclusively reveal that the three former coaches are returning for a first-of-its-kind reunion, as they take on the role of advisers on Monday. They will offer their expertise both as recording artists and former coaches to all the contestants currently in the running to win this season of The Voice.