Unfortunately I haven't found how to get these statistics
Facebook provide daily share & like stats on the "insights" page ( http://www.facebook.com/insights/ )
If someone knows where/how I can get an "history" of the likes to see the most liked pages... that info would be welcome

For example http://www.imcdb.org/v315873.html has 7 likes, including two today, but some probably have more.