Ann Powers

Nick Drake's music is catnip to a certain kind of artist. Melodically pristine and rhythmically complex in quiet ways, the small songbook of the late English singer-songwriter offers interpreters a chance to be enchanting without stretching much. Yet to make Drake's songs new is a challenge. His vocal style of lingering around a beat, while playing guitar parts that were never flashy but always dazzlingly complex, is possible to imitate but difficult to make truly personal.

In the 1970s, when Diana Krall was growing up, children and young adolescents regularly encountered very adult music on Top 40 radio. These songs were different from the sexually explicit playground rhymes so common in mainstream music today.

When the spirit of Nirvana surfaces in a song, the artist paying tribute almost always shares style points with that treasured band. The hair is shaggy, the clothes a little ragged; the lineage unfolds, relatively neatly, from punk to the present.