Selena and Ashley on Facebook's List of 2011's Most Popular Celebs in Entertainment category
Fastest growing Pages and most popular media in 2011 - the entertainment category (there is also a "music" category, but Selena's not on that list).
1. Megan Fox
2. Vin Diesel
3. Adam Sandler
4. Selena Gomez
5. Will Smith
6. Taylor Lautner
7. Jackie Chan
8. Ashley Tisdale
9. DJ Pauly D
10. Kim Kardashian
The list is apparently based on how much their official Facebook fan pages have grown in 2011 with fans/likes.
Also Dory from Finding Nemo has the second fastest growing page in the category, "Fictional characters".
Toy Story is #3 and Pirates of the Caribbean is #8 in the category, "Movies".
Source: Memology 2011 (you can see the other categories here)