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
Diana Ross at Caesar's Palace's Circus Maximus Theater in Las Vegas, Nevada, during her "Tour '79" concert tour. This concert special is noted for its opening, during which Ross literally makes her entrance through a movie screen. In November of that year, Ross performed "The Boss" album's title track as a featured artist during the Macy's Thanksgiving Day Parade, in New York City. In 1980, Ross released her most successful album to date, "Diana". Composed by Chic's Nile Rodgers and Bernard Edwards, the album included the hits "I'm Coming Out" and "Upside Down", the latter becoming her fifth chart-topping single. Prior to