If you're into Vampire Weekend, you may have asked yourself once or twice "What exactly is an Oxford comma anyway?"

"The serial comma (also known as the Oxford comma or Harvard comma) is the comma used immediately before a grammatical conjunction (nearly always and or or; sometimes nor) that precedes the last item in a list of three or more items. The phrase 'Portugal, Spain, and France', for example, is written with the serial comma, while 'Portugal, Spain and France', identical in meaning, is written without it."

Wow. Checkout the full Wikipedia entry for all the gorey details. It's a little much, I have to admit, but I'm glad I know none-the-less.

Don't forget to watch the video for the song that premiered on FMTV (that's Friday Night MTV for everyone who doesn't know what the F that means, like me), this live version on British TV show Later...With Jools Holland, and this super duper "we're having a picnic on Roosevelt's Island with the band" live version. Checkout the fifth Beatle playing maracas in the back. I wonder who's brother that is?!

And if you want to sing along and know what you're singing, checkout the lyrics page on their site.