But here's a handful from the first page of Google search results:
http://time.com/103898/5-juices-with-more-sugar-than-soda/
https://www.theguardian.com/lifeandstyle/2014/nov/11/childre...
http://www.npr.org/sections/thesalt/2014/06/09/319230765/fru...
But don't worry, they've got "NO SUGAR ADDED" printed right there on the label.
Fruits tend to have a lot of sugar and when you juice / concentrate them it only makes things worse on that front.