N.E.R.D. — superproducers Pharrell Williams and Chad Hugo with rap partner Shay Haley — do albums that can't really be described easily. Their third, Seeing Sounds ($10), is no different. With every track number comes a different sound, mixing interesting hip-rock with rusty beats with syrupy sweet horny-ballads. Standout tracks: "Everyone Nose" and "Spaz".