Who performs Fireflies?

The song "Fireflies" is performed by the American pop rock band Owl City. The song was released in 2009 as part of the band's second studio album, "Ocean Eyes". The lead singer and songwriter of Owl City, Adam Young, wrote and produced the song. "Fireflies" became a global hit, reaching the top of the charts in several countries, including the United States, United Kingdom, and Canada.