I love, love, LOVE when Jimmy Fallon does the a cappella videos with all sorts of celebrities.
And with this last one, he got nice and Christmassy on us! He did a rendition of “Wonderful Christmastime” with The Roots (duh), Reese Witherspoon, Matthew McConaughey, and YES, Paul McCartney himself!
Watch the video above and try not to sing along – I dare you! You won’t be able to do it!