Olivia Rodrigo came up with Good 4 U in the shower and turned it into a pop-punk revenge anthem that shattered chart records and helped bring rock back to the mainstream. This episode examines the song's construction, its cultural impact and the million-dollar copyright controversy that followed.

We look at how she rejected the sad-girl ballad box, the genre-blending production with Dan Nigro, and the retroactive Paramore writing credits.

• How she avoided both another ballad and a fake happy song by choosing upbeat, danceable anger
• The staccato bassline and chorus-effect guitars that built the song's explosive dynamics
• The music video's subversion of the sweet cheerleader trope with grunge-horror references
• Two number one debuts from Sour and the recognition of the track as a rock revival catalyst
• T ...