The Chordettes were one of the longest-lived vocal groups with roots in the mainstream pop and vocal harmonies of the 1940s and early '50s. Although the four women's arrangements owed more to the Andrews Sisters than doo wop, they did, unlike many of their peers, prove fairly adaptable to the rock era. First establishing themselves with the huge (and non-rock) pop hit "Mr. Sandman" in 1954, they continued to chart in the last half of the '50s and the early '60s, often with covers of rock and R&B songs. The 1958 number two hit "Lollipop" was the biggest of these. Although the group's sound (at least in retrospect) fell among the Whitest and squarest of rock artists, they introduced enough rock into their repertoire and production to sound more contemporary than they had on songs such as "Mr. Sandman."