The fewest I was able to get it in was 18. JACKSON, MICHAEL, RICHIE, AIR SUPPLY, WONDER, PRINCE, BLONDIE, MADONNA, BROWN, NEWTON-JOHN, DURAN DURAN, EASTON, MEN AT WORK, SURVIVOR, ROBINSON, POINTER SISTERS, SPRINGSTEEN, COLLINS. The hardest month seems to be Jun 1981 which is CARNES, STARS ON, A TASTE OF HONEY, ROBINSON, REO SPEEDWAGON, PARKER, HARRISON. |