This document provides an overview of the Beatles including their formation in 1961, members, signing with EMI and Capitol Records, films, why they were successful, their musical evolution from early covers to more complex songs in later years, and their final live performance in 1967 though the band continued recording until 1970. It also briefly discusses the Beach Boys as a foremost example of the California sound that predated the British Invasion and had a similar musical development and commercial success to the Beatles.