Formed early 1960s after auditioning for Ahmet Ertegun, who signed the duo to Atlantic's sublabel Atco.

They charted in the U.S. as a duo 17 times, "Deep Purple" hitting #1 in 1963 (for which they won a Grammy Award in 1963 for best rock & roll recording), "Whispering" rising to #11 (#4 adult contemporary), and "Stardust", which hit #32 in 1964 (#10 adult contemporary). They also charted 3 times as a songwriting duo, hitting #41 in the U.K. with "A Woman's Story" by Marc Almond in 1986 (Phil Spector co-writing with them).

For writing credits, please see Antonino LoTempio / Nino Tempo, April Stevens and Anna LoTempio.