Kevin "K.O." Olusola (born October 5, 1988) is an
American cellist,
beatboxer,
saxophonist,
pianist,
songwriter,
producer, and
singer. Olusola is best known as the beatboxer of the widely acclaimed vocal band
Pentatonix. After the group won
NBC's
The Sing-Off in 2011, they released 5 albums which all charted in the top 5 of the Billboard 200 charts, have sold over 2 million records, and have amassed more than one billion views on their YouTube channel. Olusola has also been identified as developing the art of "celloboxing" (playing cello and beatboxing simultaneously). His celloboxing version of
Mark Summer's "Julie-O" went viral in April 2011, which led him to become involved with Pentatonix. Olusola has performed at prestigious classical musical festivals such as the Amsterdam Cello Biennale and the Kronberg Academy Festival, opened the
TED Conference in Vancouver, and was chosen by
Quincy Jones to represent him in concert at the 2012 Montreux Jazz Festival on the same program as
Bobby McFerrin and
Chick Corea. Olusola is fluent in Mandarin.