UPDATE: Here's the YouTube version of the performance for those who may have missed it! Thanks to @Snobgrass
To quote the tweet:
Tonight, WPC will return to late night television to perform "The Spaniards" on @latelateshow with James Corden with help from Jade Puget from @AFI. Tune in to CBS at 12:37am/11:37pm C to catch the performance.
Love this song! Great to see Jade playing with Billy.
Thanks @Snobgrass I'll tweet this out again.
2 of my favorite favorite musicians playing together, I really want to know the story behind this. I do think it's a bit of a shame that Jade only really played chords though, would have liked him to have a bit of a spotlight at some point haha