"Adam's Song" is a song recorded by the American rock band Blink-182 for its third studio album, Enema of the State (1999). It was released as the third and final single from Enema of the State on September 5, 2000 through MCA Records. "Adam's Song" shares writing credits between the band's guitarist Tom DeLonge and bassist Mark Hoppus, but Hoppus was the primary composer of the song. The track concerns suicide and depression. It incorporates a piano in its bridge section, and was regarded as one of the most serious songs the band had written to that point.

Hoppus was inspired by the loneliness he experienced while on tour; while his bandmates had significant others to return home to, he was single. He was also influenced by a teen suicide letter he read in a magazine. The song takes the form of a suicide note, and contains lyrical allusions to the grunge band Nirvana. "Adam's Song" was one of the last songs to be written and recorded for Enema of the State, and it was nearly left off the album. Though Hoppus worried the subject matter was too depressing, his bandmates were receptive to its message. The song was produced by Jerry Finn.

"Adam's Song" peaked at number two on the US Billboard Hot Modern Rock Tracks chart; it was also a top 25 hit in Canada and Italy, but did not replicate its success on other charts. It received praise from music critics, who considered it a change of pace from the trio's more lighthearted singles. The single's music video, a hit on MTV, was directed by Liz Friedlander. Though the song was intended to inspire hope to those struggling with depression, it encountered controversy when a student of Columbine High School committed suicide with the track on repeat in 2000.

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