"Ain't It Fun" is a song by American rock band Paramore, released as the fourth single from their self-titled fourth studio album Paramore (2013). Produced by musician Justin Meldal-Johnsen, the song was recorded in Los Angeles. Development for it began with a keyboard loop recorded by its guitarist, Taylor York. Instruments including xylophone and bass guitar were later brought, along with a six-member gospel choir. York and the band's vocalist, Hayley Williams, wrote the song based on her experience of relocating and the latter's subsequent attitude.