Lately when a big fat bass riff drives a song, you can expect some sort of rap lyric and drumbeats to follow. There's nothing unnatural about "Loving You Easy," the Zac Brown Band's new single.

Some artists are here to entertain, while others move an audience. Jason Isbell, for example, can bring one to their knees equipped only with an acoustic guitar. When Dolly Parton pleads in “Jolene,” ...