On this day in music history: May 9, 1964 – “Hello Dolly” by Louis Armstrong hits #1 on the Billboard Hot 100 for 1 week, also topping the Adult Contemporary chart for 9 weeks on March 28, 1964. Written by Jerry Herman, it is the biggest hit for the legendary New Orleans born jazz musician. The title song to the Broadway musical starring Carol Channing in the title role, Armstrong records his version on December 3, 1963 originally as a demo recording for the song publisher’s use in promoting the show. Kapp Records releases it as a single and it becomes an unexpected hit, temporarily ending The Beatles fourteen week long hammer lock on the top of the pop singles chart. Entering the Hot 100 at #76 on February 15, 1964, it climbs to the top of the chart twelve weeks later. Sixty two years old at the time, it makes Armstrong the oldest artist in history to top the pop singles chart. “Hello Dolly” also wins Grammy Awards for Song Of The Year and Best Vocal Performance, Male in 1965. Armstrong also performs the song with Barbra Streisand in the 1969 film adaptation of the hit musical. Louis Armstrong’s version of “Hello Dolly” is inducted into the Grammy Hall Of Fame in 2001.