Can Dolly Parton really rock? Our verdict on the country legend’s ‘Rockstar’ revamp

Let’s be real: Dolly Parton is not a rock singer. Nor — as her much-hyped head-banger makeover on “Rockstar” demonstrates — does she have any business making a “rock” album. But, at 77, the country legend has, as much as any living artist today, more than earned the right — at least three lifetimes over...