Max Martin, a Swedish record producer, songwriter and retired singer, has written or co-written 24 Billboard Hot 100 number-one songs. He was worked with the likes of Taylor Swift, Katy Perry, Avril Lavigne and Britney Spears to create some of the world’s biggest hits – but there may be a secret behind the success of the songs he gets involved with.

According to Variety, Mr Martin was worth about $660 million (£475m) in 2018.

With The Hollywood Reporter claiming single sales of over 735m in 2019, Mr Martin has quickly become one of the world’s most sought after producers.

Just some of the hits he has worked on are Bad Blood by Ms Swift, I Kissed a Girl by Ms Perry, Blinding Lights by The Weeknd and even So What by Pink.

Paul Lamere, a blogger, refers to songs with similar beats as “cantograms” – which he claims are identical in the likes of Tik Tok by Kesha, Paparazzi by Lady Gaga and Baby by Justin Bieber.