The funniest thing about this song, for me, is how when it first came out, women thought it was about a guy telling his GF (or BF I guess) how she was SOOOOO wonderful, she was unbelievable (as in good), then watching their faces as you pointed out the lyrics and let them know the guy was calling his GF a two-faced, double standard holding, LIAR! So much so, she was LITERALLY unbelievable!
My favorite thing about this song is it's NOT about how unbelievably GOOD the person is, but rather how ridiculous they are--unbelievably so. I'm sure I'm not the only one who started liking the song back in the early 90s thinking it was about how great someone was. LOL!
This makes me think of big bangs, perms, oversized sweaters with leggings, and Calvin Klein Escape wafting through the air. I just hit puberty when this song emerged, but I remember thinking "Damn, this is cool!" as I popped my zits in the mirror and pulled the spinach remnants out of my braces.