April 18, 2014 | 10:19pm Looks like Gwen Stefani will be joining the cast of “The Voice” replacing Christina Aguilera as a judge for Season 7, which starts taping this summer. TMZ is reporting that the No Doubt star will be taking over Christina’s spinning chair after Aguilera announced that she is pregnant with her second child. The report also says Christina was going to try and stay on the show even though she will be ready to give birth to her second child while the show is taping.