Who assumed vocal duties on the twelfth studio album by Black Sabbath?
Fused (album):  The album also features vocalist/bassist Glenn Hughes (who briefly fronted Black Sabbath in the mid-80s, assuming vocal duties on the album "Seventh Star" - an album that was originally intended to be Iommi's first solo album) and drummer Kenny Aronoff. Seventh Star: Seventh Star is the twelfth studio album by English rock band Black Sabbath, released in January 1986.
i don't know