The song “Hallelujah” is from the movie “Shrek”, the first movie in the series. It is playing in the background when the movies shows scenes alternating between Shrek and Fiona, when Fiona is in the castle preparing the be married ...
Thanks for the clean up
But the song dates back to 1984 when it was originally released.
https://en.wikipedia.org/wiki/Hallelujah_(Leonard_Cohen_song)