Interestingly, that's the same piece of music that got KMFDM's Naïve album in trouble[1]: the original version had to be deleted and the album was unavailable for more than 10 years. A new version titled Naïve/Hell to Go and missing the O Fortuna sample was later released.

[1] https://en.wikipedia.org/wiki/Na%C3%AFve_%28album%29