With over a decade under their belt, fans have watchedthe stunning transformation of Pentatonixright before their eyes.

To enhance the group’s performance, they sought out beatboxer Kevin “K.O.”

Olusola and bass vocalist Avi Kaplan (who was eventually replaced by Matt Sallee) to join.

Pentatonix at the 2024 Grammy Awards

Pentatonix went on to win Season 3 of “The Sing-Off,” jump-starting their career.

But what were the band members like before their fame?

Grassi toldPBSthat although they lost the competition, they got lots of recognition in their high school.

Kirstin Maldonado and Scott Hoying, circa 2006

“When I saw ‘The Sing-Off,’ I thought ‘Oh, Wow.

I should try out with the trio,'” Hoying toldCincinnati Magazine.

Hoying has frequently been the group’s soloist because of his chameleon-like baritone range.

Young Scott Hoying at a McDonald’s birthday party

That means his face, and his exceptionally blond hair, are a very distinctive image of Pentatonix.

Hoying who wrote: “oooomg i’m 30 today!!!

Turns out he’s always been musically inclined!

Mitch Grassi and Scott Hoying YouTube video titled “Black Friday” from 2013

The pair would post videos of their celebrity impressions, or reaction videos.

They even produced music under the name.

Superfruit eventually stopped posting, but their sweet videos are always a reminder that those two are forever friends.

Kevin “K.O.” Olusola’s throwback band photo

Kevin K.O.

Olusola played drums in the high school band

Kevin “K.O.”

He now beatboxes to pop songs, but Olusola was first a cellist in the Yale Symphony Orchestra.

Matt Sallee with his sister in a throwback photo

Olusola has music in his blood.

“Baby Kevin percussion picture for the Owensboro High School marching band.

Ahhhh those were the days,” he captioned the post.

His followers couldn’t get enough.

Many Owensboro natives commented on his post that he’s something of a legend in their small Kentucky town.

Kaplan even welcomed his replacement warmly.

“It felt like a true passing of the torch,” Sallee said (viaThe Atlanta Journal-Constitution).

It seems like singing wasn’t his only childhood activity, though.

“Your face has not changed,” one user wrote.