You can alter movie singing so much because you go into the recording studio and, just technology for recording has gotten so good, you can hold out a note and they can combine a note from take 2 and a note from take 8. ↗
My stuff was more of a folk coffeehouse thing, with more acoustic guitar, just me doing a single, and then adding on instruments and voices, with emphasis on lyrics and singing and light kind of acoustic jazz. ↗