What is an appropriate translations of "That's so Raven!"?
I don't think this show is particularly popular in China.

A quick search on Baidu gave me results like 天才魔女 (genius girl with magic), 超能力黑少女 (raven girl with superhuman abilities), and the literal 如此瑞文.

If you are just translating the phrase "that's so _," it would be 这太 __ or 这也太 __.

For example,


  That's so cool!
  
  这太酷了吧！ or 这也太酷了吧！


If a name follows "so",


  That's so Josh!
  
  一看就是Josh做的！ or 典型的Josh作风！