Even if you have a good sense of pitch, melismatic singing may be beyond you. Very few people can sound good singing Stevie Wonder covers. For what it's worth

Even if you have a good sense of pitch, melismatic singing may be beyond you. Very few people can sound good singing Stevie Wonder covers. For what it's worth, I've improved my ability to sing with accurate pitch, by imagining the pitch in my head before I sing it.