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Hi Mohammed, I apologize if I mistook your question. Let me see if I can answer that correctly for you. one method would be to use Alexa and type in simply most popular blogs do not check off any other categories or countries. It will then give you a list of the most popular blogs and the way it decides what is more popular than the other is by how much traffic the blogs receive here is the URL with the query in it. http://www.alexa.com/search?q=most+popular+blogs&p=gkey&r=site_screener if you use Google blog search it will target only blogs and give you the ability to query only blogs when you wish to find information on them. http://www.google.com/blogsearch this website below uses Alexa gives you exactly what you are asking for as far as the most popular blogs and it allows you to set it via month and go back and look at the past as well http://www.ebizmba.com/articles/blogs in other method of finding the most popular posts would be to use this tool for blogger http://www.blogger.webaholic.co.in/2011/05/popular-posts-widget-for-blogger.html I would consider signing up for discuss and querying which blogs receive the most comments here is a article on how to find the most popular blogs for your topic http://labnol.blogspot.com/2006/06/how-to-quickly-find-good-blogs-that.html https://www.google.com/search?q=blog+popularity&source=univ&tbm=nws&tbo=u&sa=X&ei=oRAjUsbgLpHi8gSd8IHwCQ&ved=0CEUQqAI Here is a interesting article from life hacker on how to get only the blog posts you want via RSS http://lifehacker.com/344188/get-only-the-posts-you-want-from-lifehackers-site-feeds here are the top websites in the world http://www.alexa.com/topsites here is about.com and a list of the 10 most popular blogs in the world http://webtrends.about.com/od/profile1/tp/Top-10-Most-Popular-Blogs.htm one method is to use a tool like Alexa something that indexes and already knows the popularity of the websites it gives you access to. For instance I can go into category "top sites" "news" then select "weblogs" and receive this http://www.alexa.com/topsites/category/Weblogs I believe this last link might be the most useful to you http://labnol.blogspot.com/2006/06/how-to-quickly-find-good-blogs-that.html the question about RSS feeds and the number of subscribers is able to be answered using this tool however they must be using feed burner something I believe will not hurt you in your search to find out how many people have subscribed. As feed burner is by far the most popular RSS http://thinktraffic.net/how-to-find-an-unpublished-rss-subscriber-count I am sorry for the long list of links. To give you the answer regarding subscribers and most popular post I would have to say that the most popular posts is http://www.webcrawler.com/info.wbcrwl.301.6/search/web?q=most+popular+blog+posts&cid=113773113&ad.network=g&ad.keyword=most popular blog posts&ad.creative=20988964233&ad.position=1o2&ad.placement=&ad.matchtype=b&ad.aceid=&ad.ismobile=&ad.segment=info.wbcrwl.301.6 an Ehow article that I hope will help to better answer your question. http://www.ehow.com/how_2009187_most-popular-blogs.html If you would not mind elaborating more on exactly what it is you are looking to do I am certain I could be of more help. As far as trying to find the best solution for your question I hope I have done that however if I have not please let me know and I will do the best I can to answer it. If you can explain to me more fully what the end goal is I think I will be able to be of help to you. Sincerely, Thomas