Curtis Roy Boettcher, sometimes credited as Curt Boetcher or Curt Becher, was an American singer, songwriter, arranger, musician, and record producer from Wisconsin. He was a pivotal figure in what is now termed "sunshine pop", working with the Association, the Millennium, Sagittarius, Paul Revere and the Raiders, Tommy Roe, Elton John, Gene Clark, Emitt Rhodes, Tandyn Almer, the Beach Boys, and others.

The Association is an American sunshine pop band from Los Angeles, California. During the late 1960s, the band had numerous hits at or near the top of the Billboard charts and were the lead-off band at 1967's Monterey Pop Festival. Generally consisting of six to eight members, they are known for intricate vocal harmonies by the band's multiple singers.