Diana Ross (1970 album) & Tammi Terrell's "Ain't No Mountain High Enough", peaked at number one on the Hot 100, selling approximately 1,245,000 copies in the USA, and garnering a Grammy nomination for Best Female Pop Vocal Performance. As a result of the single's success, "Diana Ross" was reissued as "Ain't No Mountain High Enough", and another Ross solo LP (her 1976 LP featuring "Love Hangover") would be issued as an eponymous release. "All tracks written and produced by Nickolas Ashford & Valerie Simpson, except for "These Things Will Keep Me Loving You", written by Johnny Bristol, Harvey Fuqua, Sylvia Moy and produced by
Diana Ross Blues", reached number one on the "Billboard" 200, selling two million units. In 1973, Ross had her second number-one hit with the ballad "Touch Me in the Morning". Later in the year, Motown issued "Diana & Marvin", a duet album with fellow Motown artist Marvin Gaye. The album became an international hit. Touring throughout 1973, Ross became the first entertainer in Japan's history to receive an invitation to the Imperial Palace for a private audience with the Empress Nagako, wife of Emperor Hirohito. In April 1974, Ross became the first African-American woman to co-host the 46th Academy Awards, with John