"Fireflies" is the debut single from American electronica project Owl City's album Ocean Eyes. Frontman Adam Young wrote the track about seeing fireflies in his hometown of Owatonna, Minnesota while he was awake with insomnia. Matt Thiessen produced the song and provided guest vocals. The song is built around a "bleepy" synthline and includes lyrics about insomnia, fireflies and summer.

Owl City is an American electronic music project created in 2007 in Owatonna, Minnesota. It is one of several projects by singer, songwriter and multi-instrumentalist Adam Young, who created the project while experimenting with music in his parents' basement. Owl City developed a following on the social networking site MySpace, like many musicians who achieved success in the late 2000s, before signing with Universal Republic Records, now Republic Records, in 2008.