I know The Hallelujah Chorus is nearly ubiquitous this time of year but the musicologist in me has to point out that Messiah (the Oratorio whose second section ends with the Hallelujah Chorus) was conceived by its composer, Georg Frederick Handel, as a piece to be performed during Lent and not, as it is these days in the US, during Advent.
The text, by the way, is from the 19th and 11th chapters of the book of Revelation.
Ok, I'm done showing off. Enjoy the performance above. Even for this aging agnostic, it's a joy to watch.