The #1 single on the Billboard Hot 100 on 30 Jul 1972 was Alone Again (Naturally) by Gilbert O'Sullivan.
The billboard top 40 charts began in January, 1955
Madonna
Grenade by Bruno Mars
Yes, in 1974
The number one spot. The top of the charts. #1 in the U.S.
Mariah Carey
2001
Whoomp! (There it is)-Tag Team 1993
Let it Be
don't know the week, but it probably would have been in July or maybe August
Yes it did! In 2001, You Shot The Sheriff reached the #1 song on the charts!
The rock era charts began in January 1955. Prior to July, most of the hits that year were pretty much vanilla pop, Until Rock Around the Clock by Bill Haley and The Comets raced to the top of the charts in early July, 1955