This song finds Fältskog trading lines with Take That's Gary Barlow, who also co-penned the track. "We haven't even met," Faltskog revealed to the BBC. "I spoke to him once on the phone - but I was on holiday when he did his singing."
The lyrics for "Mary, Did You Know?" were written by Christian singer and comedian Mark Lowry, after his pastor asked him to write a Christmas musical for their church. Southern gospel musician Buddy Greene later added music to his words.