Ike and Tina began performing "Proud Mary" by Creedence Clearwater Revival during their shows in 1969. Ike wasn't fond of the original song, but he liked the cover version by Checkmates, Ltd. Ike and Tina released their version on the album "Workin' Together" in December 1970. Set at first to a slow acoustic rendition sung softly by both Ike and Tina, the song then transformed into a frenetic rock and soul dervish led by Tina and the Ikettes. The single was released in January 1971, reaching No. 4 on the Hot 100 and No. 5 on the R&amp;B chart. It sold more than a million copies, becoming the duo's best-selling single to date and won them a Grammy Award for Best R&amp;B Vocal Performance by a Group at the 14th Annual Grammy Awards. "Workin' Together" became their most successful studio album, peaking at No. 25 on the "Billboard" 200 and No. 3 on the R&amp;B chart. It includes the duo's social conscious title track, "Workin' Together," "Funkier Than A Mosquita's Tweeter" penned by Tina's sister Alline Bullock, and notable covers such as "Get Back" and "Let It Be" by the Beatles.