On this day in 1968 – Marvin Gaye scored his first US No.1 single when ‘I Heard It Through The Grapevine’ started a five-week run at the top of the charts. It was Marvin’s 15th solo hit and also his first UK No.1 single in March 69. Written by Norman Whitfield and Barrett Strong in 1966, the single was first recorded by Smokey Robinson & the Miracles as well as Gladys Knight & the Pips.