I just love the The Chainsmokers ft. Halsey - Closer cover. It really hits the spot. But then I also love the lead singer, his name is Kenton Chen. He has amazing vocal ability, especially with falsetto.

Falsetto is in mechanical sense, about contracting your vocal cords to make your voice much higher. When you try to do a Micky Mouse voice that is falsetto. If a singer is good enough at controlling their falsetto range it can sound very good.

But that takes a ton of practice.

Just as long as you aren't tone deaf.

Time deafness is a physical thing, similar to how colorblindness works, with a lack of certain sensors in their respective organs, if you're tone deaf, you can't learn how to hear tonality, but. That doesn't actually mean you can't sing. You'll just have to learn a different way to tell how on key you are etc.

Singing is 'just' muscle coordination, strength, breathing, memorisation and confidence! Also it helps if your skull is the right shape.

The truth is that while not everybody can be Beyoncé just like they can be an Olympic athlete. Most people can be trained to sing really well just like they can run long distances.