Blake Shelton has been hard at work traveling the country on his Country Music Freaks Tour, which he has to fit in before he starts the LIVE shows on THE VOICE. I mean, his schedule has got to be pretty exhausting right now, but that didn’t stop him from rushing home the other day to make sure he didn’t miss Apollo’s 4th birthday! Apollo is Gwen Stefani’s youngest son. And he didn’t just show up…Blake went with the Scooby Doo theme and dressed up as shaggy complete with an AWESOME wig. Gwen was Daphne by the way, and the whole day was just precious. Check out a video…