With a week to go before the first-ever fall premiere of "
The Voice,"
Adam Levine dropped by "
The Tonight Show" to talk it up. While he was there,
Jay Leno wanted to know more about Levine's impression of his co-coach
Blake Shelton. He's had more than two seasons to perfect Shelton's southern drawl, and it looks like he's got it down.Levine gave Leno a teaser of the impression during the interview, saying that it just kind of comes ...