The first single release where Diana Ross's name was featured separately on a Supremes record. A huge international hit, it reached No 5 UK and No 2 US in September '67. Its considered to be Motown's first delve in to the new psychedelic production techniques becoming popular at the time. Thats Earl Van Dyke on 'test oscillator' adding those weird sounds in the intro. UK Sales, particularly in the North of England were helped by the very dancefloor-friendly B Side.