Two artists who haven't released new music since 2013 recently remerged into the limelight: Katy Perry, with her dystopian disco banger "Chained to the Rhythm" and Lorde, with the melodramatic-yet-uplifting anthem "Green Light." 

Listening carefully, a fact becomes apparent, despite Lorde's insistence that she "hears new sounds" in her mind: there's something familiar lurking beneath both these tracks. And indeed, both were co-written and produced by key figures of the modern pop music firmament. Who are they, and how do we detect their fingerprints on the latest from these two low-voiced chanteuses? Tune in and test your acumen in a high-stakes game of musical forensics. 

Featuring:

Katy Perry - Chained to the Rhythm

Lorde - Green Light

...and some secret songs

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