i think she just said she wanted to stop doing it.
Appearing on a show like that takes a lot of time since its live and you pretty much put your life on hold while its airing.
Plus, I'll assume she wants to tour and what not as well, and she wont be able to do that next year if she is on the show.
http://www.eonline.com/news/347915/c...obably-be-back
here is just one interview from eonline... there are tons of others from google as well.