The band's original concept and much of its commercial success came as a cover band playing classic songs in a unique style. Said Miranda, the group's concept was to "take a song that's already proven it could be a hit and put our spin on it".[5] That "spin" consisted of a combination of rich harmonies on vocals and upbeat tempos marked by prominent percussion and sometimes elaborate orchestration. The group later composed its own songs.
The group's major hits were "See You in September" (1966), which was originally recorded by the Tempos in 1959, and a cover version of the George Gershwin/Ira Gershwinsong, "I Got Rhythm" (1967), updated for the group's sunshine pop musical style. "See You In September" and "I Got Rhythm" were on the BillboardHot 100charts for 14 weeks in 1966 and 13 weeks in 1967, respectively, forming musical bookends for the 1966–1967 school year, based on their Hot 100 #3 peak dates. "I Got Rhythm" and Billy Stewart's "Summertime" also formed Gershwin musical bookends for the same school year, based on the very same Hot 100 peak dates. Disc sales for both "See You in September" and "I Got Rhythm" exceeded one million copies, resulting in R.I.A.A.gold record awards by 1969.[6]
The group had nine Billboard Hot 100 Singles hits from 1966 to 1968, including versions of "Go Away Little Girl" (#12) (a #1 hit for Steve Lawrence in 1963 and later for Donny Osmond in 1971) and "My Mammy" (#13) (popularized by Al Jolson in the 1920s).[7] They also both achieved sales in excess of one million copies, garnering the group another couple of gold records.[6] "Hare Krishna," a version of a song from the musicalHair (1969), was the group's last Hot 100 hit.[7]
The band continues to perform with lead singer Miranda as the only remaining original member.[3]