Celeb Royalty Willow Smith & Sean Lennon Share Carrie Fisher Co-Written 'Bird Song'

Here's an interesting grouping that totally makes sense: Sean Ono Lennon, son of John and Yoko, has released a new song sung with Willow Smith, daughter of Will and Jada, and co-written with Carrie Fisher, daughter of Debbie Reynolds, long before her tragic death.

Listen to the piano-led, dreamy, quantifiably Beatles-esque (sorry Sean!) "Bird Song" below: