Wow! What a thread... you guys have already mentioned all the ones that popped into my head, plus some others that I hadn't thought of, and some I actually don't like (LOL)... what a trip down memory lane!
A few thoughts/reactions:
"Seasons in the Sun" has made my eyes tear up more than once. I don't think the music is all that inspired, but anyone who has lost a loved one can associate with the lyrics...
Some "secret embarrassments" change over time. I used to secretly like "Sugar, Sugar", but today it does nothing for me. Guess I outgrew it.
Then again, I saw a music video on TV a year or two ago of a song that was obviously manufactured "bubble gum" at its worst, but I found it catchy and likeable, even as I wanted to dislike it. I don't remember the group's name, but the song was "Roller-Coaster". Maybe I haven't outgrown ALL that stuff. LOL
I had never heard of Boney M until I moved to Hong Kong, but they were all over the place here once I arrived here. Even now, their LPs outnumber Herpes All-pert and almost everyone else in the used-LP bins! Corny but very catchy stuff; I remember liking to dance to "Rasputin".
Some of the songs mentioned in this thread I don't think should be embarrassments, but I guess this is all relative to context: I like Japanese Koto and Shakuhachi music, and Flamenco and some "Native American" chanting and the more soulful Russian folk songs, but my fellow students used to want to tar and feather me and chase me out of the dorm when I'd crank that stuff up. I had to dub it from the University music department's reference library to even get it at all back then. Today that kind of stuff gets its own section in the music stores under "world music" and is considered acceptably "sophisticated". Play classical stuff at a Hell's Angels gathering and watch how much "respect" you get, but admit to liking Guns 'n Roses at a highbrow string quartet concert and you'll notice some raised eyebrows and sniffing noses. I like it all, just choose when to admit to liking what so people feel more comfortable with me (more than the other way around). It's all music, and one shouldn't look down on someone for liking any of it (except for rap...

).
Then there are the songs that maybe you are supposed to hate or not, but that I DO HATE: Ben, by Michael Jackson, and You Light Up My Life, by Debbie Boone, for example; these songs can still make me

uke: .