Sheryl Crow’s 2008 album is a balancing act of magisterial proportions, seamlessly weaving together the ardently political and the painstakingly personal. Part rallying cry against the Bush administration (“God Bless This Mess”) and part post-breakup lament (“Diamond Ring”), Detours is held together by Crow’s gravelly, emotive vocals, whether epic and choral, as on “Out of Our Heads,” or country-tinged and multilayered, as on the title track.