Entertainment TV Gwen Stefani May Replace Christina Aguilera on 'The Voice' The No Doubt singer would join Pharrell Williams as the newest cast member By Mike Fleeman Published on April 19, 2014 10:50 AM Share Tweet Pin Email Photo: Todd Williamson/Invision/AP No doubt about it, changes are coming to The Voice. Following news that Pharrell Williams will take CeeLo Green’s chair, reports say that Gwen Stefani also appears to be joining the singing show as a coach for season 7. Stefani would replace Christina Aguilera, who is expecting her second child with husband-to-be Matt Rutler. The Hollywood Reporter and The Wrap.com report Stefani’s deal is still in the works; TMZ says she’s already signed on. Blake Shelton and Adam Levine are both expected to be back. PHOTOS: Spoiler! Meet The Voice‘s Talented Top 12