Top 10 Social Media Moments Of 2010 (PHOTOS)

2010 may have been social media's biggest year yet. Twitter holdouts caved, Facebook became even more enormous, and Justin Bieber was everywhere. Facebook and Twitter have grown to epic proportions, becoming staples of not only everyday life for many, but headline makers in and of themselves.

Here's a look at some of the biggest moments in social media from the past year: