system
Given the following post, respond as if you're commenting on Reddit:
human
Why do accents disappear when people sing?
gpt
singing is different from speaking because it uses sustained sounds. this changes the way we pronounce words because its drawn out, and it also changes the way the audience hears the words we sing because it exposes every little part of each syllable. 

good vocal technique is very focused on vowel shape and diction (consonants) in order to get a full, rich, mature sound and be clearly understood. interestingly, vowel shape and diction are also a big part of what differentiates regional accents. singers who use good technique will naturally start to drop some of the hallmarks of their regional accent as they focus on using warm, open vowels and clear, crisp consonants. 

I should also note that singers who are not classically trained do not focus on these techniques as much. This is why many singers in pop, country, rock, folk, and so on sing just like they talk.