When historians look at the year 2012, they’ll likely check our use of social media to understand the biggest topics of the day.

For their sake, let’s hope this infographic from SEO.com survives, because it will make the job of analyzing 2012 through a social media lens much easier. The infographic compiles a mess of data, from the top Google searches to the hottest topics on Twitter, and everything in between.

Here, for example, are the most popular memes on Facebook:

1. TBH (to be honest)
2. YOLO (you only live once)
3. KONY
4. One-word Comment
5. Gangnam Style
6. Cinnamon Challenge
7. Cray
8. SMH (shaking my head)
9. Big Bird
10. Linsanity

And on Twitter, the year’s top to tweets came from President Barack Obama and pop star Justin Bieber:

1. “Four more years” @BarackObama (810,000 retweets)
2. “RIP Avalanna. i love you.” @JustinBieber

See the infographic for the full scoop: