Q: Passage: This article lists the fifty most-subscribed channels on the video platform YouTube. The ability to subscribe to channels was introduced by October 2005, and the website began publishing a list of its most-subscribed channels by May 2006, at which time Smosh, with fewer than three thousand subscribers, occupied the number-one position. Since December 22, 2013, the most-subscribed channel has been PewDiePie, with over 65 million as of August 2018.

Question: Based on this passage, who's got the most subscribers on youtube? Let's give stream of consciousness first:
The relevant information is: Since December 22, 2013, the most-subscribed channel has been PewDiePie, with over 65 million as of August 2018. Therefore, the final answer is PewDiePie.