Afternoon Delight by the Starland Vocal Band was a great song.
The group won a Grammy for best new group and proceeded to never be heard from again :(
Bill and Taffy Danoff who founded the group actually co-wrote and sang on a bigger hit and called themselves Fat City. Before forming Starland Vocal Band they co-wrote and sang Take me home country roads with John Denver. Look up an early video of Country Roads.