Meme Animals just released their 2011 review of the best cat memes including Chemistry Cat, Nyan Cat, Lenin Cat and more!

Virals of 2011: Casey Heynes, the star of this viral fight video who defends himself by pile driving his attacker, received an overwhelming amount of support this year and was even honored on stage by the Canadian pop singer Justin Bieber.

Virals of 2011: Charlie Sheen set the Guinness World Record as the "Faster Time to Reach 1 Million Followers" earlier this year and continued to make waves on the social networking site when he accidentally tweeted his cell phone number last week.

Virals of 2011: The announcement of Egyptian president Mubarak's resignation in January came with an unexpected photoshop meme, featuring a solemn-faced army officer who was standing behind the vice president Omar Soliman during the historic press conference.

Virals of 2011: A video of former radio announcer Ted Williams showing off his amazing vocal abilities while panhandling on the streets on Columbus, Ohio has accumulated over 17 million views since January this year. Last month, he popped in at the OWS camp in NYC to show his support for the movement.