(Saturday, April 25, 1970) — “ABC” by The Jackson 5 peaked at #1 on today’s Billboard Hot 100 singles chart for two consecutive weeks (Apr. 25, May 2, 1970).

It was the second of 17 number one hits on the chart featuring then-11-year-old lead singer Michael Jackson (the first four number ones were with The Jackson 5, the rest as a solo artist).