"Evocative, hooky big-beat folk-rock." T-Bone Burnett contributes one of his most nuanced productions on The Indescribable Wow - full of varied settings for Phillips's love songs (the Shirelles-style Latin lilt of "Out of Time") and spiritual doubts (the raga-rockish "Holding On to the Earth").
Released as a single, "Sunny" reached #3 on the R&B charts, #2 on the Billboard Hot 100, and #12 in the UK. When Hebb toured with The Beatles in 1966 his "Sunny" was as well received as any Beatles tune. BMI rated "Sunny" number 25 in its "Top 100 Songs of the Century".