"Dementia" is a song by American electronica project Owl City from his second extended play Shooting Star.
[3] The song is a punk rock track and has been met with positive reviews from music critics, most noting that Young sounds similar to Tom DeLonge and complimented its production.
[3] Young told his manager that he hoped to have Mark Hoppus on the track, who flew from London to New York to record the song in the studio.
[10][2] Speaking about how the collaboration came together, Young stated, "Somehow my track made its way to his inbox and he liked it enough to come so we hung out in the studio and recorded his vocals and he's exactly the way I thought he would be.
Katie Hasty of Uproxx called the collaboration, "slightly out of each artist's usual arena," but described the song as a "high-energy track.