“Someday We’ll Be Together” is a song written by Johnny Bristol, Jackey Beavers, and Harvey Fuqua. It was the last of twelve American number-one pop singles for Diana Ross & the Supremes on the Motown label. Although it was released as the final Supremes’ song featuring Diana Ross, who left the group for a solo career in January 1970, it was recorded as Ross’ first solo single and Supremes’ members Mary Wilson and Cindy Birdsong do not sing on the recording. Both appear on the B-side, “He’s My Sunny Boy”.
The single topped the Billboard Hot 100 pop singles chart for one week, in the final 1969 issue of Billboard magazine (dated December 27). It would be the last number one hit of the 1960s. – WIKI