The Chordettes were one of the longest-lived vocal groups with roots in the mainstream pop and vocal harmonies of the 1940s and early 1950s. 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, non-rock, pop hit, "Mr. Sandman," in 1954. They continued to chart in the last half of the 1950s and the early 1960s, often with covers of rock and R&B songs. The #2, 1958, hit "Lollipop," was the biggest of these. Although they sounded (at least in retrospect), 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 earlier records.