On Thursday, Facebook announced that it surpassed the 1 billion user milestone last month. The company celebrated with a new TV commercial comparing Facebook to chairs (which has drawn plenty of Clint Eastwood-related jokes out of the social media universe).

Along with the impressive milestone, Facebook dropped a number of other interesting stats, including:

• Over 1.13 trillion likes since launch in February 2009
• 140.3 billion friend connections
• 219 billion photos uploaded
• Data was pulled on 9/10/2012, and represents the total # of photos currently on this site – in other words, it excludes deleted photos.  If we wanted to include all photos ever uploaded, the estimate we have is 265 billion. Photo uploading launched fall 2005.
• 17 billion location-tagged posts, including check-ins
• Includes location-tagged posts as well as check-ins. Data was pulled 9/10/2012, and represents total location-tagged posts & check-ins since launch of the product in August 2010
• 62.6 million songs have been played 22 billion times – that’s about 210,000 years of music
• Data was pulled on 9/11/2012, and represents song plays since the launch of music-listening applications in September 2011

Facebook says the median age of users joining Facebook the week it hit its 1 billion user milestone was about 22, and the top five countries for new users were Brazil, India, Indonesia, Mexico and the U.S. Interestingly, this is almost identical to characteristics of users who signed up the week Facebook hit 500 million users, when the median age was 23, and the top five countries consisted of the same ones.