Otis Redding The Astonishing (male) +/+
Outkast The Astonishing (male) +/+
Odyssey The Astonishing (male) +/+
Ofra Haza The Astonishing (female) +/+
Odetta The Astonishing (female) +/+
Orinoco Flow The Astonishing (female) +/+
Olivia Newton John The Astonishing (female) +/+
Oleta Adams The Astonishing (female) +/-
Orange Crush The Astonishing (female) +/-
Oxygen The Astonishing (female) +/+