You know that feeling? It's not deja vu, you swear it's real, not a brainchem fork, you're sure you hear that thing but you heard something just like it some while ago. That's what it is, it's a throughline.
The Bobby Vee tune is not the common popular version, I found myself inserting the "thnock" sound by snapping the tongue off the roof of the mouth. Now go brush your teeth. Don't be a wonkerer. Easter eggs? Lead tunes of both bubbles mention "captain and crew", and the 1st + last tracks both order coffee.