voyage was a french disco and pop / funk group , consisting of andré '' slim '' pezin ( guitar / vocals ) , marc chantereau ( keyboards / vocals ) , pierre-alain dahan ( drums / vocals ) and sauveur mallia ( bass ) , together with british lead vocalist sylvia mason-james , who sang on the group 's first two albums , voyage ( 1977 ) and let 's fly away ( 1978 ) .