Reba McEntire honored John Lennon—on what would have been his 80th birthday on Oct. 9—by sharing her performance of “If I Fell” via YouTube. Reba’s performance was recorded in 2000 during the UK TV special, Stars Sing the Beatles, which also featured Engelbert Humperdinck, Sid Owen, Paul Marazzi and more. “If I Fell,” which was…