"Tough darts" is the only one I've not heard of.
Thinking of Whitney, I've long thought of her as A Voice In Search Of A Song, and for me, "Exhale" was that song, and like John L, pretty much always was. Nothing before or after came close...however, in retrospect, "How Will I Know" is one of those Great Songs Of Innocence that's sung without a touch of innocence, or knowingness...just no sense of empathy for the lyrics, but still sung the hell out of vocally, which...maybe that's where Things Started Going Wrong in R&B Singing...style trumping substance, gesture w/o meaning becoming meaning, hell, I don't know. I just don't know. It was music in general too, not just R&B...everything just too damn literal, everything know, nothing unknown, Know it all, have it all, nothing left to know or to have. Or so you want to think...
But "Exhale....DAMN, that was some deep, DEEP stuff on that one, and for me, just to know that she did have it in her, that whatever it was that took her to get there that she could and did get there, and was not just A Voice In Search Of A Song, that's good enough for me.
Found this on YouTube, the isolated vocal tracks from "How Will I Know"...great song, great voice, just...not at the same time. But it was what it was, it is what is is, and here we are.