ON THIS DATE (51 YEARS AGO) November 28, 1974 - John Lennon's final live concert performance took place when he surprised fans by joining Elton John onstage at Madison Square Garden. The appearance was to honor a bet: Elton had guest-starred on Lennon's single "Whatever Gets You Thru the Night" and wagered that the song would reach #1 on the Billboard Hot 100. When it did (becoming Lennon's only solo #1 in his lifetime), Lennon agreed to perform with Elton if the prediction came true. That night