First time hearing GODISH 神っぽいな 歌いました by Ado! 

This whole song is sang only by Ado

Every voice you heard throughout the whole song is ado's voice

Fun fact: in japanese its actually named "like a god". "Cover" in japanese usually use "try singing"(or something similiar). So the title of this video actually meant "i tried singing like a god" which she did.

glad you enjoyed! and yes, all voices you hear are Ado, including the high-pitched/childish one you were asking about. also, she's only a singer, she doesn't produce, compose or write her songs. she instead works w other amazing musicians to create these wonderful songs!

This is also a cover from a popular vocaloid song, the producer of the original is PinocchioP. A vocaloid song is basically a song where there is no human artist singing, the singing is done by a Vocal Synth which means that it doesnt have any human limitation which allows the producers to express themselves freely. Its always impressive when someone does a cover of a vocaloid since a lot of them are not intended to be sung by a real vocalist. Fun fact: Ado started her career by doing covers of vocaloid songs on youtube.

Ado has confirmed that this song is multiple recordings put together (she said she could not switch her voice that fast (at least when the song came out, she might be able to now to an extent)), but all of the vocals in this song are her voice!

this was a flex of her multiple voices

Kamippoi Na is originally a vocaloid song... which Ado covered in spades. That explains the pace and complexity and Ado is adding the flashiness.

Ado's TOT MUSICA will blow your mind, I bet!

All the voices in this song are from Ado

The song was produced by PinocchioP(ピノキオピーP )(P = producer's abbreviation) He is proficient in describing satirical social phenomena as a songwriter. Like this song is describing the phenomenon of people blindly praising idols and selfishly evaluating others I also recommend you to check ado's "I’m a Controversy" (アタシは問題作) This is a song she co-produced with PinocchioP, and it is also produced in her image. It will definitely amaze you.

I want you to react to "Backlight" next

I can see that you have put both feet in the swamp of Ado.

Recommend all LIVE versions of Ado, it is another new world, for example "SHOW" "unravel"

"I know everything." This song satirizes ignorant fools who boast as if they were omnipotent and all-knowing gods. In Japanese, "ka mi ppo i na" means god-like. There are also a lot of people on RU-vid who upload videos boasting about their very limited knowledge.