Newton-John said: "It was such a joy singing these beautiful holiday songs with my favourite singer and good mate John Farnham.

The holidays are about family and friends and having this chance to sing these classics with John was pure fun from beginning to end!

"[2] Farnham and [Newton-John performed together in concert numerous times, and released two ARIA number-one albums: Highlights from The Main Event in 1998,[3] from The Main Event Tour, also featuring Anthony Warlow and Two Strong Hearts Live in 2015.

They added: "Everything here is turned into a duet (and) producer Chong Lim hasn't done much except capture the voices and add choirs and orchestration to make it as lush as you'd expect.

The Broadway smiles one imagines plastered across their faces may not be contagious, but the "cheer" will certainly be heard over even the most frantic Christmas eve shopper's pounding, desperate heartbeat.