Remember the rock singer who scored a decade ago with the hit “One of Us”? She’s gone on many a musical adventure since the mainstream lost sight of her, including side trips into country with friends like Ricky Skaggs and the Dixie Chicks. Now Joan plunges into a full-on country album at last, and does so with her typical taste and care. Pretty Little Stranger is filled with finely crafted originals and well-chosen covers, highlighted by performances from Nashville’s finest pickers (including Vince Gill and Alison Krauss) and starring one of the greatest voices in any genre.