Charles Kelley on Solo Career, 'The Driver' and David Lee Roth

It’s hard to overlook Charles Kelley. At six-foot-six, he’s literally one of the biggest men in country music, with a super-sized voice to match. Ever since Grammy-nominated single “The Driver” kicked off his solo career last September, though, Kelley has been reintroducing himself, hoping to carve out a reputation not…