Paul McCartney performed a mashup of A Day in the Life from The Beatles'' album Sgt. Pepper's Lonely Hearts Club Band and Give Peace a Chance by John Lennon and Yoko Ono (the Plastic Ono Band from their album Live Peace in Toronto 1969). . He played the song in his second of two sold-out Detroit concert on Monday night, but the evening was tinged with tragedy due to the deadly mass shooting in Las Vegas Sunday night (Oct 1). McCartney provided fans a beacon of hope: "On such a terrible day, we're going to celebrate the joy in life," he said. Take a look: https://www.youtube.com/watch?v=FZIj4iPDGnc