Stevie Wonder

For Once In My Life: Lots of grace notes(eg 00:14) and grace note with blue note fill-in (eg 00:20-00:22)

Happy Birthday: quite a few suspensions (fourth scale chord) composed into the song (00:18, 00:22, 00:26) and used as a fill-in (01:16, 01:18,)

You Are the Sunshine Of My Life: scale tone fill-in (00:04-00:07), inversion fill-in (00:21, 00:35-00:36)