Always in on the joke! Blake Shelton has always playfully poked fun at his fellow Voice coaches — and Kelly Clarkson is no different.During the Thursday, December 2, episode of The Tonight Show Starring Jimmy Fallon, the country singer, 45, was surprised when the host said he thinks Clarkson’s team is going to win season 21 because she has the group Girl Named Tom on her team.“The only thing I worry about with that particular group is they’re on Kelly’s team, and while Kelly is a great person and an incredible artist and a great talk show host, she is hands down, the worst coach we’ve ever had on The Voice,” the “God’s Country” singer told Jimmy Fallon.“Out of everyone, more than Adam [Levine]?” the comedian, 47, responded, causing Shelton
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