Jansen left the group in late 1962 to go solo and was replaced by Peggy Santiglia, formerly of The Delicates (with Denise Ferri and Arleen Lanzotti). Santiglia had sung jingles for WINS Radio, appeared on Broadway, and had songwriting experience. In 1963, the trio signed to Mercury Records' subsidiary label Smash Records and began working with the Feldman-Goldstein-Gottehrer songwriting team, who wrote "My Boyfriend's Back". The Angels' performance (with Santiglia on lead) was originally intended as a demo for The Shirelles' consideration, but the music publishers chose instead to release it as it stood. The song was a major hit, reaching number one on the "Billboard" Hot 100. "My Boyfriend's Back" sold over one million copies, and was awarded a gold disc. The follow-up was the lower-charting "I Adore Him" (No. 25 US). The B-side "Thank You And Goodnight" charted at No. 84 US. During their Smash career, the Angels maintained a steady string of moderately successful singles which included "Wow Wow Wee (He's The Boy For Me)" (No. 41 US). Their album "My Boyfriend's Back " made the top forty, charting at No. 33. but their next, "A Halo to You", did not chart. The group left Smash in 1964 and signed with Congress Records.