Watch: Meghan Trainor Rocks ‘Fallon’ / Releases ‘I Believe in Santa’ Video Starring JoJo Siwa

The December 10th airing of ‘The Tonight Show with Jimmy Fallon’ featured GRAMMY winner Meghan Trainor, who is still hot on the promo trail in support of her inaugural holiday LP ‘A Very Trainor Christmas.’

While the album’s Earth, Wind & Fire-assisted cut, ‘Holidays,’ got its inaugural late nite live treatment courtesy of an electrifying performance at ‘Fallon,’ another of its standouts – ‘I Believe in Santa‘ – was seeing its official music video premiere on the Web.

Highlighted by appearances from actress/singer/media personality JoJo Siwa, look inside to see all the action:

See Trainor’s trip to ‘The Tonight Show’ below:

https://www.youtube.com/watch?v=aVgj8HAvey4

https://www.youtube.com/watch?v=EqfjWmojMHs