There are at least two artists with the name "Carol Ann". One is a metalcore band from California and the other is (was) a sludge/doom unit from Arizona.
Taken from the sludge band's myspace:
"The teenage prequel to Black Hell and Graves at Sea was CAROL ANN. We played for about seven years, and shared the stage with such great acts as Noothgrush, Bongzilla, Drop Dead, Born Dead Icons, Sourvein, Unruh, From Ashes Rise, Citizen Fish, Orange Goblin, Alabama… read more