Green Day’s Billie Joe Armstrong entered rehab over the weekend, after what is being deemed a meltdown at the iHeart Music festival in Las Vegas. However, Armstrong’s trip to get treatment for substance abused won’t affect his mentoring roll on “The Voice.” According to Deadline, a rep for NBC said that they are all taped and ready to go with his spot. Armstrong will take a mentoring roll with Christina Aguilera’s team.