(CMT Offstage keeps a 24/7 watch on everything that's happening with country music artists behind the scenes and out of the spotlight.)

How dare Christina Aguilera. When Brad Paisley and Blake Shelton sang "Don't Drink the Water" on Tuesday night's (June 28) episode of The Voice, she didn't even crack a smile. Country music may not be her cup of tea, but come on. She feigned no joy. And these are two of the music world's funniest men, singing a very funny song about what you really drink in Mexico. She just sat in her big red coach's chair, all serious, giving them some weak, obligatory applause. Maybe this is why it's taking a while for Shelton to get used to being in L.A. "I haven't found, you know, a good place to hunt yet, other than the kitchen of the house we rented," he told CMT Radio. "We saw about a three-foot rat in there. But when it comes to offending people, that's international. I can do that from the comfort of my own home I've found. I don't have to be in L.A. to do that." Maybe Aguilera will like Wednesday night's (June 29) country duet better. It's Shelton's wife (Miranda Lambert) and the finalist from his team (Dia Frampton). No word on what song they'll sing. Whatever it is, it will rock. I'm sure of it.