Top 10 Adult Male Singers with Boy-ish VoicesI mean adult male singers that are, say, older than 20 but their voices sound as if they didn't mature enough and will never sound very manly. This effect of a "boy-ish voice" is usually created by singers with high and thin voices, or singers who often use falsetto.
Hammerfall singer Joacim Cans said about the falsetto "You just have to find your "child" voice and do exercises using that voice."
Similarly to this, some singers probably find and use their pre-puberty voices even when they don't use falsetto.
And last but not least, people's voices are genetically stored as a code in the DNA.
A boy-ish voice doesn't mean the singer is bad. And it doesn't mean the boy-ish voices can't sound good - there are 3 types of singers in this category:
1) boy-ish voices that sound very good
2) boy-ish voices that are OK
3) boy-ish voices that sound bad.
The Top Ten Adult Male Singers with Boy-ish Voices
Yep. He does sound younger most of the time.
High, thin and smooth voice (and with hiccups, LOL) - Metal_Treasure
He kinda looks like a girl.
(singer for Helloween, Avantasia, Unisonic).
He's an example of a good sounding boy-ish voice that has enough power. Michael Kiske is a great metal singer that often sounds like a kid hitting high notes but he does it incredibly good. Even now, when he's 50, he still sounds quite boy-ish AND good. I know he's got good lows, too, where he sounds manly but he doesn't use low notes very often because he's mostly a high pitch singer. - Metal_Treasure
He's a metal singer (Skull Fist) but his voice sounds so weird for a 30 yo male that many people thought he used studio tricks to get this effect. But there are no studio tricks - the guy does sound like that.
Songs: Skull Fist - Get Fisted, Hour to Live. - Metal_Treasure
He provides lead vocals for Sleeping with Sirens and he sounds really boy-ish.
An example is the song "Go Go Go" - a song of 2015 when he was 29.
His voice is more boy-ish than Kiske's but Kiske is higher because he's a better singer. - Metal_Treasure
(The Bee Gees singer)
He sounds boy-ish because he usually uses falsetto (R&B falsetto, in particular). - Metal_Treasure
He is 30 yo and sounds really boy-ish but he sounds good and not annoying.
example: Theocracy - I Am. - Metal_Treasure
Singer for metal band Ne Obliviscaris with a very clean and beautiful voice. His falsetto is awesome, too. He sounds like an angel and when I heard his falsetto in the song below (chorus), I thought it was a female opera singer. But he isn't very high on this list because his voice is less "boy-ish" than the voices of some other singers.
Song: Ne Obliviscaris - Urn (Part I) - And Within the Void We Are Breathless - Metal_Treasure
Kinda sounds like one.
He's a good singer with a very high and thin voice that makes it sound "boy-ish" (he's the lead singer for metal band Stratovarius). - Metal_Treasure
An example of immature voice that doesn't sound very good (Rush singer) - Metal_Treasure
When he snarls he sounds very manly and it isn't boy-ish. But when he tries to really sing his voice sounds annoyingly immature and weak. - Metal_Treasure