"Some Nights" is a song by American indie pop band Fun. It was released on June 4, 2012, as the second single from their second album Some Nights. The song was written by Jeff Bhasker, Nate Ruess, Andrew Dost, and Jack Antonoff. Musically "Some Nights" is an indie pop song with elements of power pop and afrobeat while the lyrics depict the protagonist having an existential crisis.

In the United States, "Some Nights" was a sleeper hit, spending approximately seven months on the Billboard Hot 100 before reaching a peak of number three for six non-consecutive weeks beginning the week of September 29, 2012. The song became Fun's second single to enter the chart's top ten, as well as their second song to be certified platinum in the US, after their previous single, "We Are Young". "Some Nights" was also successful in countries around the world.

Musically, "Some Nights" is an indie pop song with strong, festive elements of power pop and influences from folk rock. It is written in the key of C major at a tempo of 108 beats per minute. A line in their lyrics, "this is it boys, this is war", recalls the English version of Nena's 1983 hit "99 Luftballons". Lyrically, the song expresses the existential angst of a young protagonist who is a long way from home. Lead singer Nate Ruess explained to Mesfin Fekadu of the Associated Press: "I'm always thinking about, 'Who am I and why did I do something like that?' And I think then it harkens back to my family, and I have such a strong tie to them and it's always therapeutic to sing about them." Ruess came up with the song and album title while on tour in Scotland; he wrote the song based on the title. Lyrically, the song is about "just being someone different on any given night."

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