"Gnarly" is a song by girl group Katseye. It was released on April 30, 2025, through Hybe UMG and Geffen Records, as the lead single for their upcoming EP Beautiful Chaos. Described as a hyperpop song, "Gnarly" was written by Alice Longyu Gao, Tim Randolph, Kyle Buckley, Jacob Kasher Hindlin and Madison Love, with production by Buckley, "Hitman" Bang and Slow Rabbit.
Despite initially receiving a polarizing response from fans, the song became a success, earning the group their first entries on the Billboard Hot 100 and the UK singles chart.