The social networking site has released “Twitter’s 2011 Year in review” with movie, TV, music and more categories. Some of the results are pretty surprising!

Topping the most-tweeted-about TV list is Pretty Little Liars, followed by Two and a Half Men and Lifetime’s The Craigslist Killer. In the movies category, Thor is number one, followed by The Dark Knight Rises, X-Men: First Class, Fast Five and the Green Hornet.

Justin Bieber is suspiciously missing from the music list (doesn’t it seem like Twitter is always talking about him?), which places Rebecca Black/’Friday’ at the top, followed by Nate Dogg, ‘FEMME FATALE’ (yes, in all caps), Gerry Rafferty and Gil Scott-Heron.

Mila Kunis, Anne Hathaway, Natalie Portman, The Vampire Diaries’ Nina Dobrev and Emma Watson all made the actresses list, topped by Elizabeth Taylor. Meanwhile, Charlie Sheen tops the list of actors, which also includes Macaulay Culkin, Ricky Gervais, Jake Gyllenhaal, Ashton Kutcher, Colin Firth and James Franco in the top 10.

See the full list, which includes rankings for popular topics in soccer, football, hashtags, NBA, world news, baseball, food & drink, tech, and cities & countries, at this link.

Which popular topics were you surprised to see and which ones were conspicuously missing?