Diana is credited for 8 number ones because someone wrote in several years back to chart beat when Fred Bronson was running the column and pled the case they are solo records since Mary and Cindy are absent. Of course if there so willing to bend the rules they should credit Diana with 20 number ones since she had 12 as a Supremes, 5 solo, 1 with Lionel Richie and has 2 uncredited vocal turns [[We Are The World & Mo Money Mo Problems). I do remember someone writing in after the switch and pointing out that Yesterday is technically a solo Paul McCartney song but they weren't willing to switch that....