The four singers were working as session musicians on Scaggs’ Down Two Then Left album. They also worked on the self-titled album by Lisa Dalbello which was produced by David Foster. Dalbello – with whom Porcaro had formed a relationship – was invited to vocalize on the “Miss Sun” track, one of several demos which Lukather, Hungate, Paich and Porcaro cut at Davlen Studios. These demos led to the four musicians being signed to Columbia – Scaggs’ label – as the nucleus of the group Toto. “Miss Sun” was never featured on an original Toto album – the demo track was released on Toto XX in 1998 – but in 1980 Scaggs cut the song with Bill Schnee producing and Hungate, Lukather, Paich and Porcaro providing backing: Dalbello chanced to then be in Los Angeles and was invited to replicate her vocal contribution to the original demo. Scaggs’ version of “Miss Sun” – on which he shared songwriting credit with Paich – was the only previously unreleased track on Scaggs’ 1980 compilation album Hits! which would punctuate Scaggs’ career as a regular album artist, his subsequent releases being spaced several years apart.
As a single, “Miss Sun” peaked at #14 in February 1981. Billboard ranked it No. 99 in its year-end survey for 1981