The Carpool Karaoke segment is the most social hit ever on U.S. late night television, with almost 600 million views on YouTube since its inception only a year ago. The show has quickly become known for attracting the world’s biggest stars including Adele and Justin Bieber, whose Carpool Karaoke segments are currently the #1 and #2 most watched Late Night clips on YouTube*, along with Jennifer Lopez, Stevie Wonder, Gwen Stefani, Elton John and One Direction.