Someday We'll Be Together with Diana Ross singing lead on the 1960s decennial finale of "The Ed Sullivan Show" that aired live Sunday, December 21, 1969 on CBS. "Someday We'll Be Together" was the final number at Diana Ross & the Supremes' farewell concert on January 14, 1970 at the Frontier Hotel in Las Vegas. After the completion of the show, Jean Terrell was presented onstage to the audience as Diana Ross' replacement (alongside Wilson and Birdsong). Thus "Diana Ross & the Supremes" officially split apart, becoming "Diana Ross" (the solo act) and "The Supremes" (the group). Ross reunited with Wilson and Birdsong in
The Supremes career was publicly announced. "Someday We'll Be Together" was recorded with the intent of releasing it as the first solo single for Diana Ross. Desiring a final Supremes number-one record, Gordy instead had the song released as a Diana Ross & the Supremes single, despite the fact that neither Wilson nor Birdsong sang on the record. "Someday We'll Be Together" hit number one on the American pop charts, becoming not only the Supremes' 12th and final number-one hit, but also the final number-one hit of the 1960s. This single also would mark the Supremes' final television appearance together with Ross,