One problem many artists have when covering another musician is picking the most famous, most legendary song they can think of. You know, like doing "Smells Like Teen Spirit" for a Nirvana tribute album. Such choices almost inevitably mean that your new version will pale by comparison with the original. St. Vincent's Annie Clark has a talent for choosing less obvious covers and making them her own. [There may not be many obscure Beatles songs, but "Dig a Pony," which she covered a couple years ago, comes close.] Now, she has covered Brian Eno's "Some of Them Are Old," a sleeper of a tune off his first pop album. The results are luminous.