How Blake Shelton replaced Taylor Swift as the face of country music

This weekend, Blake Shelton will do the most mainstream American of mainstream American things: Be the host and musical guest on "Saturday Night Live."Shelton is the first country singer to host the famed late-night sketch show since Taylor Swift, who took the stage in November 2009, way back when she was decidedly still a country star. It's a fitting, pass-the-baton situation: Now that Swift has officially defected to the pop world, Nashville needs a new face of mainstream country music. And th...