Is this the inspiration for the music used in Dredd?

Paul Leonard-Morgan wrote the film's industrial music score. Leonard-Morgan created music to suit the film's futuristic setting. He experimented with band-based music, but decided it sounded over-produced and too safe. He turned to electronic music and used 1980s-style synthesisers and modern sound modules to create various combinations and applied distortion and other effects to the result. Leonard-Morgan said, "I was looking to create a timeless score which couldn't be placed in any particular era. So it's ended up being a cross between a modern dance track and evocative soundscapes." For scenes conveying the effect of the Slo-Mo narcotic, he composed new music with real instruments and then slowed the songs down by thousands of percent to match the visuals, such that one second of his composed score could last 10 minutes. He then added additional real-time score to the slowed track. An unofficially altered Justin Bieber song served as inspiration for the Slo-Mo theme. Garland said that Portishead instrumentalist Geoff Barrow "sent me a link to a Justin Bieber song slowed down 800 times and it became this stunning trippy choral music." Morgan then recreated the effect based on the modified track, which was used in the finished film. The film used Bieber's music as a temporary placeholder during editing before the score was finalized.(source)

From the above wiki reference- Garland said that Portishead instrumentalist Geoff Barrow "sent me a link to a Justin Bieber song slowed down 800 times and it became this stunning trippy choral music. That clearly says that its inspired from Biber song and even it is temporary placeholder during editing before the score was finalized.

The slow-mo music was apparently based on a slowed down Justin Bieber song, but I seem to recall slowing songs like this was a popular fad a few years ago.