You know those really cheesy songs that you're not supposed to like, but they're too catchy not to? Jason's familiar with the concept. For him, it involves his obsession with "Call Me Maybe". And he's not even embarrassed by it.
Although the context is something I can totally stand by — namely, anything and everything Portal — I'm not too terribly keen on the musical stylings. But it's just... too... damn... catchy.