Olivia Rodrigo, Ava Max, and Doja Cat interpolating old songs for new hits

"Interpolations have run rampant in the strange year of 2021. Just ask Olivia Rodrigo, Ava Max, Lorde and Doja Cat, who’ve all made charting or platinum records in the past year borrowing beats and melodies from older hits. As a musical concept, interpolations are a cousin to sampling, the art of sticking sound snippets of older songs into new projects that has defined so much of hip-hop. Rather than lifting or modifying a recorded track, though, an interpolation cribs only from a song’s written composition — whether that’s lyrics, a melody, a riff or a beat" - Rolling Stone goes into the story of interpolating old songs for new hits.