"What's My Age Again?" is a song by American rock band Blink-182. It was released in April 1999 as the lead single from the group's third studio album, Enema of the State (1999), released through MCA Records. "What's My Age Again?" shares writing credits between the band's guitarist Tom DeLonge and bassist Mark Hoppus, but Hoppus was the primary composer of the song. It was the band's first single to feature drummer Travis Barker. A mid-tempo pop punk song, "What's My Age Again?" is memorable for its distinctive, arpeggiated guitar intro. The song lyrically revolves around the onset of age and maturity, and the failure to implement changes in one's behavior. Hoppus declined to label the song as autobiographical, but admitted that he spent his twenties acting immature. The trio recorded the song with producer Jerry Finn. It was originally titled "Peter Pan Complex", an allusion to the pop-psychology concept, but the record label found the reference obscure and adjusted the title. The song's signature music video famously features the band running nude on the streets of Los Angeles. It received heavy rotation on MTV and other music video channels. It became one of the band's best-performing singles, peaking at number two on Billboard's Modern Rock Tracks chart in the U.S. for ten weeks. The song placed at number three in Italy and number 17 in the United Kingdom. Primarily an airplay hit, the song was the band's first to cross over to pop radio, hitting number 58 on the Billboard Hot 100. The song received positive reviews and has been called a classic pop punk track; NME placed it at number 117 on its list "150 Best Tracks of the Past 15 Years" in 2012.[1]