 "7 and 7 Is" made the "Billboard" Pop Singles chart on July 30, 1966, peaking at number 33 during a ten-week chart run and becoming the band's highest-charting hit single.The recording also featured on the band's second album, "Da Capo".The song drew inspiration from a high school sweetheart of Lee, Anita "Pretty" Billings, who shared his birthday, March 7.