Ken Tucker

On Cruel Joke, Pomeroy, age 22, sings with an acoustic twang about farms and cowboys. The 92-year-old Nelson's Oh What a Beautiful World is an album of covers of songs by Rodney Crowell.

Thomas' April 23 death at age 71 brings to a close one of the most significant avant-garde experiments ever conducted within the confines of pop music. Rock critic Ken Tucker reflects on his legacy.

Lamar's duet with SZA samples Luther Vandross' 1982 hit "If This World Were Mine." The song was written by Marvin Gaye, who himself recorded it in 1967 as a duet with Tammi Terrell.