When she's not starring on Nashville, Lennon Stella is busy with her own music career as one half of Lennon and Maisy. Ever since the sister-sister duo's cover of "Boom Clap" brought us to tears, we've been obsessed with them. While they're great together, Lennon just branched out, teaming up with singer Marc Scibilia for a cover of John Lennon's "Happy XMas (War Is Over)." In case you're curious, yes, Lennon was named after the late Beatle! Enjoy, and consider this Lennon's holiday gift to you.