It only took fifteen minutes for Bob Gaudio to pen the lyrics to 'Sherry', which was originally named 'Jackie Baby' as a tribute to First Lady Jacqueline Kennedy. Producer Bob Crewe had suggested to Gaudio that he should write a song which exploited Valli's remarkable vocal range. It reached number 1 in America and stayed there for five weeks along with top-ten success in the British charts. Under his guidance, the group followed up with 'Big Girls Don't Cry' and another number 1 in the American charts ensued. The Four Seasons were one of the few American acts to survive the British invasion of 1964. Indeed, they are the only act to have a US number 1 hit before, during and after the Beatles successfully invaded the USA.