as the rest of the album's twelve songs, in eight hours. From there, Hoppus and DeLonge recorded their bass and guitar tracks at multiple studios throughout Los Angeles and San Diego. The band brought in session musician Roger Joseph Manning Jr.—best known for his career in the band Jellyfish and work with Beck—to add keyboard parts in the background of the song. The song originally concluded after its final chorus. While recording, Hoppus liked how the arpeggiated chord progression continued over the rhythm guitar line in the last chorus, and wished to extend its length to highlight this element. In the pre-digital recording environment, this required the team to "bounce" the mix from the analog tape recorder (a 24 track 2-inch tape) to another tape, and splice the recordings together. With recording complete, the song was sent to engineer Tom Lord-Alge, who mixed the song at his South Beach Studios facility in Miami Beach, Florida. Lord-Alge had had previously remixed the Dude Ranch singles "Dammit" and "Josie" for radio, and would work with the group frequently in the future. Lord-Alge added subtle touches, including a panning effect for the title phrase in the last chorus. Release and chart performance The working title for the song was "Peter Pan Complex", referencing the popular psychology concept of an adult who is socially immature. Executives at MCA Records were uncertain that listeners would connect with the title, given it goes unmentioned in the song's lyrics. Previously, the label had appended parentheses to its two stateside singles from Dude Ranch: "Dammit (Growing Up)" and "Josie (Everything's Gonna Be Fine)". The label was also concerned about litigation from the Walt Disney Company, who held rights to the name following their film adaption. The band disliked the suggestion, but given the creative freedom MCA had afforded them throughout recording, agreed to the change. Hoppus later conceded the new title made more sense and "feels right". Band management and label executives saw a strong single in "What's My Age Again?" although DeLonge felt otherwise: "I didn't understand it, because up to that point, we hadn't had a big single." Commercially, "What's My Age Again?" became one of the band's best-performing singles. It was picked as the lead single from Enema of the State. It was first serviced to radio in April 1999, and premiered on KROQ-FM, an influential Los Angeles alternative station. Hoppus remembered the group were