Sep 6, 2010 19:58 GMT  ·  By

Last month, just as YouTube passed the 10 million Facebook fans mark, we rounded up the top ten most popular Facebook Pages. Despite its huge size, Facebook activity is still increasing at a huge pace and in just one month, all of the top pages now have a few million more fans.

While the overall ranking hasn't changed that much, there have been a couple of shake ups. What's more, it looks like the first spot is being challenged, though it may still take a couple of months for a new number one to emerge.

The most popular page on Facebook, just like last month, is Texas Hold'em Poker, the page dedicated to Zynga's poker app. At 23.5 million fans, it holds a solid lead, but the second most popular page, Michael Jackson's, has grown faster than Zynga's game. If the trend continues, the Texas Hold'em Poker page may be overtaken.

Further down the list are the usual suspects, the page dedicated to the social network itself is in third place followed by pop star icon Lady Gaga, both with over 17 million fans. Both pages added about 2.5 million fans in the past month.

The top five, which is identical to last month's, is completed by the Family Guy comedy series page.

The first change in the ranking is at number six where Vin Diesel's page is now, having overtaken the Mafia Wars page. Diesel added about 1.8 million fans in the last month.

The page dedicated to the TV series House managed to overtake both Starbucks and Barack Obama in popularity and snatch the seventh spot. It should be noted that there is also a Dr. House page which currently has over 10 million fans. If both pages were to be counted, the House page would be the most popular on Facebook.

The top 10 Facebook pages as of September 6, 2010

1 (1). Texas Hold'em Poker - 23,511,482 (+1,388,283) fans
2 (2). Michael Jackson - 19,390,369  (+1,659,917) fans
3 (3).  Facebook - 17,774,209 (+2,490,326) fans
4 (4).  Lady Gaga - 17,097,736 (+2,504,147) fans
5 (5).  Family Guy - 16,518,341 (+2,195,630) fans
6 (7).  Vin Diesel - 14,891,903 (+1,795,317) fans
7 (6).  Mafia Wars -  13,747,189 (+432,090) fans
8 (10).  House - 13,188,596 (+1,635,880) fans
9 (9).  Starbucks - 13,173,492 (+1,482,846) fans
10 (8).  Barack Obama - 13,055,161 (+1,201,321) fans