Oak
Oak Ridge Boys
John O'Banion
Ric Ocasek
Billy Ocean
O'Jays
Ollie & Jerry
Alexander O'Neal
One 2 Many
Opus
Roy Orbison
Orchestral Manoeuvres In The Dark
Benjamin Orr
Robert Ellis Orrall
Jeffrey Osborne
Donny Osmond
Other Ones
The Outfield
Outlaws
Oxo