The song was a collaborative effort written by Ronson, Mars, Jeff Bhasker, and Philip Lawrence. It famously underwent a “labored” seven-month creation process, involving over 100 takes for the guitar part alone, which Ronson worked on across multiple cities including London, Memphis, and Los Angeles.

“Uptown Funk” is a 2014 global hit by British-American producer Mark Ronson, featuring vocals by American singer Bruno Mars. Released as the lead single from Ronson’s fourth studio album, Uptown Special, it became a massive cultural phenomenon.