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Stefan Janković (Born: October 30, 2001), better known online as Janko (or Jankeza), is a Serbian YouTube vlogger, mainly known for his songs Vazi and I sam Znas, which both have or millions of views.
Janko started his channel on December 17, 2015. He has been making various vlogs and experiments which gained him popularity. He became wide famous for his video where he pranks his teacher on facebook. The video rapidly got over 1 million views. Although it's believed that the prank video was a hoax. Another video which blow him up even more was the watermelon-cocacola challenger, where he put mentos and coke inside of a watermelon also gaining million views.
In 2018, Janko released his first song I sam Znas. The song was created with the help of another Serbian YouTuber by the name Glisha. He helped Janko with the beat and the lyrics. The song became rapidly famous getting over 11 million views. When Janko saw how his song became huge, he created his second song in 2019 by the name Vazi which got six million views.