Facebook co-founder Mark Zuckerberg counted the company’s one billionth user today, a major milestone for social networks.

Using AppData’s new PageData service, we found the 10 top pages on Facebook, listed in order of total likes on Facebook. In addition, GalleyCat collected five key Facebook resources for writers, readers and publishing professionals.

1.   Facebook for Every Phone 143,247,720
2.   Facebook 76,963,135
3.   Texas HoldEm Poker 64,813,609
4.   YouTube 63,254,366
5.   Eminem 61,181,449
6.   Rihanna 60,383,957
7.   The Simpsons 54,914,578
8.   Shakira 54,725,540
9.   Lady Gaga 53,150,671
10.   Coca-Cola 52,122,847