In the early 21st century, ska was mostly absent from the radio, though there were exceptions. In 2017, Captain SKA reached #4 on the UK charts with "Liar Liar GE2017." In 2018, The Interrupters broke into the U.S. charts with their single "She's Kerosene." By 2019, several publications started wondering aloud whether a "fourth wave" of ska was about to emerge. On January 25, 2021, the Mighty Mighty Bosstones released the ska-punk opus "The Final Parade." A collaboration with a large group of influential ska artists, the single is eight minutes long and may be considered a seminal moment, possibly kicking off the fourth wave of ska.