The last quickest leader? An earworm by Herman's Hermits.
Per Record Research's Paul Haney, "Road," at 1:53 in length (counting its original version, not its 2:37-long remix with Billy Ray Cyrus), packs the quickest punch at No. 1 since Herman's Hermits' "I'm Henry VIII, I Am," which led the list dated Aug. 7, 1965. The latter song, the British band's hooky second No. 1, sports a 1:49 runtime.
Encompassing the Hot 100's entire 60-year history, "Road" ties David Rose's 1962 No. 1 "The Stripper" as the fifth-briefest leader.