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Juan Karlos Labajo (born February 5, 2001), also known as JK or Karlos, is a Filipino singer and actor. He is an artist of ABS-CBN's Star Magic and also a part of MCA Records. He auditioned for ABS-CBN's reality singing competition The Voice Kids (Philippines Season 1) shown from June to July 2014. Labajo was a finalist, finishing in third place. After his stint at The Voice Kids, he debuted his acting career in the drama anthology Maalaala Mo Kayaplaying himself for his own life story. He was casted in drama series. He played as Charles Kenneth "CK" Rodriguez in Hawak-Kamay in 2014 and as Vincent "Amboy" Mobido in Pangako Sa 'Yo from 2015 up to 2016.