Think about the smooth, mellifluous sounds of the cello. Now think about the thumping, staccato of beatboxing. You don't often hear the two in the same song, but 23-year-old classically-trained cellist Kevin Olusola has become a YouTube sensation for his innovative method of blending the two together.

Olusola came up with the idea to cellobox during a year-and-a-half stint studying in China. He tried it out in his room and decided to debut it at a talent show, where he received lots of praise.

"It started hitting me that I could do this," Olusola said.

Perhaps this is just one way Olusola combines his talents. The Yale University graduate double majored in pre-medical and East Asian Studies, and was part of the winning a cappella group, called Pentatonix, on NBC's The Sing-Off in November. He also plays the saxophone and is a composer.

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Olusola said he never thought he would end up with a music career -- it was something he just did for fun.

"I love it; it's something that the Lord gave to me and I want to see what I can do with it," he said.

Kevin Olusola is making history ... as a "celloboxer," with millions of YouTube hits for his renditions of popular songs by Michael Jackson, Usher, Justin Beiber and other artists. He even opened a show for rapper KRS One, who told him he could take his talents far in the hip hop world.

What's next for Kevin?

Kevin and the members of Pentatonix won a Sony Music recording contract and $200,000 from their win on "The Sing-Off." The group is currently working on releasing an EP and later an album. Olusola is also working on learning about music production.

In his own words ...

In addition, he says his work known as Julie-O and Riding Solo was definitely one of his favority pieces to perform.

A little-known fact about Kevin Olusola ...

Olusola placed second in an international music competition, where renowned cellist Yo-Yo Ma called his celloboxing performance "inventive and unexpected."

Listen to Kevin Olusola celloboxing to Michael Jackson's "Smooth Criminal" here.