Idina Menzel and Jimmy Fallon picked up the kids instruments, and with The Roots they put together an awesome rendition of 'Let It Go'.

Any parent of a child 9 years old or younger has probably heard 'Let It Go', and watched Frozen more times than they'd like to admit.  So it's that much more impressive that Fallon and The Roots have found a way to make it this entertaining.

I will say that Fallon continues to make me a fan.