king of pop is a good example. at least I've always referred to him.
man in the mirror , leave me alone , smooth criminal , in the closet , remember the time , dirty diana.
read the lyrics, watch the music video (for better reference, and music videos usually has a "visual interpretation" of the music) , watch how he sings. he literally means what he sings (a.k.a sing it like you mean it). I always tell bands when I record, for each of the lyrics of your song, try to visualize a "music video" scene or something dramatic and sing as if you're the "actor/actress" of the song. sometimes the "happy/sad thoughts" will work , but random thoughts may only distract. gotta feeeeel it.
pitch are basics, but the other aspect to watch out for is "tone" , e.g. again. the MJ songs I mentioned, MJ plays alot with the dynamics of his vocal tone into the "feel" . e.g.
Remember The Time , somewhere near the end he goes like "remember, mah Babayyyyyyyyy whoo" , he goes some sort of husky. like literally drilling into your head to "remember"
or in Dirty Diana you can literally visualize him in tears in the recording studio.
smooth criminal , even if you haven't watched his ever famous white suit dance, he sings the song (and the melody is great anyway) as if he really is literally the smooth criminal, but to pull this kinda thing off, I think it touches another aspect of vocals that has nothing to do with singing itself, called Charisma.
I always tell bands, Songs are musical stories of your experiences. if you didn't, i'm very sure the reason why you're performing this song (or that cover) is because you can relate very much to it.
80¢ worth , whether i make sense or not, this works for myself personally (as a non musician) and all my recording bands.