Simplify the following text for a Grade 11 native English-speaking person.
Original: The group 's three principal members May , Taylor and Rodgers were supplemented on tour by Queen 's former touring keyboard player Spike Edney , rhythm guitarist Jamie Moses , and bass guitarist Danny Miranda who had previously worked with Blue Ã -- yster Cult .
Simplified: When in concert Brian May , Roger Taylor and Paul Rodgers would be helped by keyboard player Spike Edney , rhythm guitarist Jamie Moses and bassist Danny Miranda .