Not that the love story between Shrek and Fiona wasn't already compelling enough, having Rufus Wainwright's cover of "Hallelujah" soundtrack Fiona's permanent change into an ogre could shatter hearts. Somehow, this song has an even more touching history beyond the green and smelly love story that launched its popularity. Wainwright originally covered the song as a tribute to Jeff Buckley, the 90s heartthrob that made this Leonard Cohen song a household name. Buckley's death was tragic and unexpected, and Wainwright's rendition of the song conveys the confusion and sadness in losing a good friend. If you're looking to cover a song to play for a special person in your life, it would not hurt to learn "Hallelujah." From ogres to deceased musicians, it seems to have its compelling moments.