What unusual distinction unites these artists (and some others)?

Tori Amos, David Bowie, Duran Duran, Erasure, Nanci Griffith, Guns N Roses, k.d. lang, Annie Lennox, Mandy Moore, Simple Minds, and Luther Vandross

Answer: they all released covers albums–albums composed entirely of covers of other people’s songs. Specifically: Strange Little Girls, Pin Ups, Thank You, Other People’s Songs, Other Voices, Other Rooms, The Spaghetti Incident?, Drag, Medusa, Coverage, Neon Lights, and Songs.