Snippets of songs. They go round and around in my head.

Oh. I thought this was just me. I tend to repeat phrases or meaningless collections of syllables in my head, but I also got warrant’s cherry pie stuck in my head for several months once , which was awful

If I'm not listening to music or hyperfocusing really hard there's a constant looping snippet of some random song playing almost all the time, usually just a few seconds long. Changing it requires to listen to something else. I don't really mind it (as long as the song doesn't suck!), seems like my brain just needs a constant rhythm throughout the day. I always thought that it's normal for everyone until I learned about neuro divergence a year ago.

Bad enough that I cannot handle music with lyrics, with a few exceptions. Genres like post-rock are all I listen to.

It basically does not stop

Eenie-meanie-cippolini-oom-pop-pop-a-leaney-hotchie-kotchi-Liberace-I-love-you.

Yes

Non-stop, unless I'm listening to, or singing something. If something gets stuck, I have to listen to that stick specifically and read the lyrics while the song is playing... Then it goes away

It used to be awful, I'd end up repeating the last thing I said in my head over and over 'til there was something else I needed to process verbally.

I'd say moderate. I keep repeating song lyrics and quotes.

I've got about 10 seconds of an incubus song I don't even know the name of circling in my head since I woke up. I can't remember the last time I actually heard it.

I get this pretty bad from time to time. Usually, I'm spelling a word over and over again. Sometimes, the chorus of a song.

When I consciously recognize I'm doing it, I can usually force myself to switch from one word to another, and after three or four times, I lose interest in it.

Worst is waking up in the middle of the night doing it. I try to avoid it by keeping video playing overnight.

It depends. Sometimes it hits hard and others I can just ignore it. My daughter and I do like to try to get songs stuck in each other's heads though, so we'll constantly quote lyrics to each other and try to pass them off as regular conversation

I call them my word/phrase/song of the day. Same as you, internal is strong AF, but unsure about external.

I had "dragon cum" stuck in my head for years (I think I picked it up from bad dragon) and now "gay homosexual women" has been stuck in my head for a few months now.