"I found my perfect lover, but he's only half my age," sings Chrissie Hynde on Fidelity!, a collaboration with JP Jones, a Welshman who is indeed half her age but not her lover. From an old rock dude, this might be icky. But Hynde is a force of nature with a voice that's still sexily badass at 59. It helps that she is a versatile singer who can sound as ancient as Leonard Cohen after a pack of Gauloises. And if these midtempo guitar rockers are restrained musically, their naked ruminations on lust, love and aging feel real and lived.