 Complete the following phrase:  After arriving in London from Los Angeles in mid May 1968, to start work at the Beatles Apple Corps headquarters at the invitation of her friend Derek Taylor, Chris ODell began a career that saw her become, in author Philip Normans words, the ultimate insider in rock-music circles. In the space of two years, ODell witnessed first-hand a series of key moments in rock n roll: she joined in the backing chorus on the song Hey Jude; she was on the Apple rooftop in January 1969 when the Beatles played live for the last time; she personally delivered the harmonicas for Bob Dylans comeback performance at the Isle of Wight; and on the day Paul McCartney announced he was leaving the Beatles, she was there at George Harrisons Friar Park mansion when Harrison and John Lennon met to discuss the news. Later in the 1970s, ODell went on to work with the Rolling Stones, during the LA sessions for Exile on Main St. 1972 and their subsequent 