On the Diana Krall-produced Love Is the Answer, Barbra Streisand takes on standards that have towered over the pop canon for decades, like the gently insomniac “In the Wee Small Hours of the Morning” and the bereft “Smoke Gets In Your Eyes.” Krall’s production frames Streisand’s voice with brushed drums and muted strings, letting the legendary singer’s interpretative skill shine on the sweetly hopeful “Make Someone Happy” (cowritten by Funny Girl composer Jule Styne) and the longing “Spring Can Really Hang You Up the Most.”