"California Soul" is a funk-soul tune written by Ashford & Simpson, issued originally as the B-side of the Messengers' single "Window Shopping" in 1967 under the Motown group of labels.
The 5th Dimension's performed better, reaching number 25 on the pop singles chart.
[6] Marvin and Tammi's cover was the B-side of "The Onion Song".
The duo's version of "California Soul" reached number 50 pop but never charted on the US R&B chart.
[7] The duet was released after Terrell's death from a brain tumor in March 1970.