Here's a radio station survey from WKLO in Louisville, Kentucky for the week ending May 30, 1970. It shows the last original Monkees single, "Oh My My," coming in at #10 on their countdown for the week. You'll also see that singer/songwriter Paul Williams is on the chart with his own version of "Someday Man," which was a single for The Monkees in 1969.
In the United States, "Oh My My" peaked at a lowly #98 on the Billboard singles chart on June 13, 1970.
A big thanks to Gilbert Matthews for sending this piece to the Live Almanac. Be sure to check out his internet radio station!