Can't Escape the Spoken Word

I was emailing a friend about what to wear to a special event. Several times we have been in situations when we've worn the same color or similar outfit. Wanting to avoid looking like twins, I went on to mention a blue sweater I was planning to wear.
When I first typed "blue", it looked weird. I guess I don't write many things about blue, so I looked at it some more. I backspaced and typed it again.... and again. I'm sitting here thinking "why isn't Spell Check picking up on this word?" Maybe it's the font or the lighting in the room or just me. I guess it's probably because it was spelled correctly! Has that ever happened to you? Not with blue, but with any word? That made me think of something else that happens; sometimes I'll say a word too many times that it starts to sound goofy, like it's not really a word? Try it yourself with "lamp" or "bulb" or "couch" or "dog" or anything; it usually has to be a one syllable word, sometimes two syllable words work.
Something similar happens with songs or names. You get one stuck in your head and it stays there. It actually, stays there for a full day! It's never a familiar song like "Happy Birthday" or "The Star Spangled Banner" or "Twinkle Twinkle Little Star". It's usually just a phrase from some silly song you happened to hear while changing radio stations on the way to work; recently "p-p-p-poker face" was with me all day; no matter how many other songs I heard or sang to, "p-p-p-poker face" was the refrain to all of them.
Then there's the thing with a name. I once had Millard Fillmore rattling around my brain for the whole day. That really freaked me out and nearly drove me crazy. How does Millard Fillmore even come up to get stuck in your head? Who's having conversations about this guy? I don't think he's been the subject of talk radio... ever! But his name happened to get stuck in my head. And there was nothing I could do about it; believe me, I tried. I purposely thought of other odd names; Itshak Perlman, Kareem Abdul Jabbar, Andrew Swanfeldt (he wrote a crossword puzzle dictionary; sometimes I need a reference book). Nothing worked. Millard Fillmore was my constant companion until I fell asleep that night.
I mentioned this to my friend in the next email and she said it happens to her occasionally, too. We laughed (LOL LOL) to each other. Our conclusion: we're just a pair of good friends that think alike. Rats! There I go again; now "pair" looks weird.