Nat King and Natalie Cole – Unforgettable (1991)
This Grammy award winner was released a full 26 years after the death of Nat King Cole.
Patsy Cline – Duets (Volume 1) (1999)
There’s a huge amount of posthumous collections of her music, but this “duets” recording contains performances from Willie Nelson, Waylon Jennings and Brian Wilson and was released 33 years after her death.
Notorious B.I.G. – Born Again (1999)
Composed primarily from unfinished material and unreleased verses recorded mainly during his Ready to Die era from 1993 to 1994, with new production and guest rappers. The album featured appearances from Nas, Ice Cube, Eminem, Busta Rhymes, Mobb Deep, Missy Elliott, Method Man, Redman, Beanie Sigel, Too Short, Snoop Dogg, and the Hot Boys.