Nick Cave and the Bad Seeds, “O” Children”
This song was featured on the Nick Cave & the Bad Seeds album “Abattoir Blues/The Lyre of Orpheus”, released in 2004. It made its appearance in “Harry Potter and the Deathly Hallows: Part 1”, an anachronism, since the dancing scene is set in 1997 according to the canonical timeline.
In an interview, Matt Biffa, the music supervisor for Harry Potter and the Deathly Hallows: Part 1, explained that he chose the song because he identified with its lyrics on a personal level, as he was separating from his wife at the time and worried how it would effect their two young sons. According to Biffa, obtaining permission to use the song in the film was not difficult, and Nick Cave was happy that it was a lesser-known Bad Seeds song that had been selected.