Yoko Ono is not going to be too pleased with this: it turns out John Lennon was quite happy during his infamous "Lost Weekend" period. The "weekend," which lasted 18 months (during 1973-75), was a separation from Ono, where he spent nearly two years with the couple's one-time employee May Pang (in both LA and NYC). It has long been said that he was depressed during this time, but if Pang's new book of photographs,......