Dementia

This song takes Adam Young, who records under the moniker of Owl City, into new, rockier territory. It features Mark Hoppus, the lead singer from Blink-182, who provided bass and co-writing to the track. Hoppus also contributed vocals to the second verse and accompanied Young on the chorus. The Fireflies singer told Billboard magazine that working with Hoppus, "was a privilege and an honor." He added, "I've always been a big blink fan, so to have him sing on the track, I still play it back and can't believe it's Mark on the track. It's awesome."

The song documents some of the more psychotic thoughts and feelings Young dealt with in the wake of his successful Ocean Eyes debut album.

The experience of working with Hoppus lived up to everything Young had imagined, and then some. "I learned [from working with him] that it is possible to be at a level where Mark is at and still be incredibly genuine and incredibly real," he told MTV News. "Because, first of all, I've never laughed so hard in the session 'cause the guy's so funny and he's always like, he's like the funny guy who's in that band and he just has this thing where it's so him and sometimes you meet people and you're not sure if they're really the way they perceive themselves to be," he continued. "But it was so cool and I've been such a nerdy Blink fan forever. I was like 'There he is. He's in the studio and he's singing on my song. I can't believe it.' Totally [a] dream come true, it was awesome."