Not to rain on anyone's parade, but this coincides with Facebook instituting a system this week that takes information listed in a user's "personal information" and links it to corresponding pages. For example, in the past, you could list STP in your favorite music, but to be a fan of the band you had to separately go to the STP fan page and click "become a fan." Now, if you list STP in your favorite music, Facebook automatically links you as a person who "likes" STP on their fan page. This would explain the sudden increase in popularity.