QUIZ: Do you know these classic Christmas song lyrics?

25 December 2019, 16:00 | Updated: 25 December 2019, 16:01

John and Yoko - Happy Xmas (War Is Over)
John and Yoko - Happy Xmas (War Is Over). Picture: Frank Barrett/Keystone/Hulton Archive/Getty Images

You've been hearing these classic songs all over Christmas - but do you know them off by heart? We'll give you a line - you have to fill in the gap!