Mash-ups in your mind

[Faust]

This happens to me often. Part of a song rings in my mind, on repeat, then either unconsciously or upon trying to resolve it and switch gears, I jump to another one completely. At this point they "blend" together. I'm not even sure if they necessarily must share the same key - I probably change it, but the intervals or melody fit. Share some examples!

Today I kept hearing Secret Chiefs 3's Renunciation for some reason, which gradually transformed into Björk's the Hunter.

[jigglypuff]

butts and poop. butts made of poop

but seriously that happens to me with a lot of doo wop songs

[Catoptric]

[Sappho]

I hear second subject groups all the time and often have to think the piece to the end in order to pinpoint the composer. Meanwhile, naturally, different pieces tend to blend into it, since I can't not think of music, even if I try to focus on one.

Once I had a very short cello motif stuck in my head which kept merging into something from a Mozart trio, yet I knew for sure that the original motif wasn't Mozart's. I took a walk and thought about it so hard for three hours that my head began to hurt. About a week later, while perusing my drafts, it dawned on me that the mystery motif was actually something that I had written.

[Light Leak]

It happens to me and it annoys the hell out of me when it happens. I can't think of an example right now because it's not currently happening.

[C.J.Woolf]

I find it nearly impossible to sing "We gather together to ask the Lord's blessing" without slipping into "The Streets of Laredo".