April 9 Hot 100 number-one hits Billboard magazine, 1977 Dancin Queen Number one

on the billboard hot 100 its the Beetles with 20 number ones after that is Mariah Carey with 18 number ones

As of the week that will end on July, 13, 2013, the Billboard Hot 100 has had 1,027 different number one hits on it since it began in August 1958. These hits range all over the musical map.

The Billboard Hot 100 has been in effect since 1958. The first number one single was Poor Little Fool by Ricky Nelson and there have been more than 1020 number one hits since.

"Every Rose Has a Thorn" by Poison was the Billboard Hot 100 top single from December 18, 1988 to January 7, 1989.