I like the instrumentation of the song better in the original and I felt Jeff's falsetto performance of the lyric more. Not taking anything away from the other two but in the first video the song sounded more intimate to me. With that said, I think Kenny's version has the better vocal dynamics (runs, ad-libs, etc.) and probably overall the better vocal performance. Jon was sensual in his own right though.
Drake is infatuated with Aaliyah. I guess he grew up with a mad crush on her like we did. I don't know about his new song(s) with her but that's his business.
I Care 4 U may be the most emotional Aaliyah song ever for me. Probably my favorite along with One In A Million and 4 Page Letter. They way she emotes in this song is sad and beautiful at the same time.