Rihanna, One Direction, Adam Lambert Fans, Get Ready For A Fan Army Face-Off On 'The Big And Best Of 2012' Live Stream: PLUS 12 Reasons To Watch!

Fan Armies GET READY, because we're gonna appoint the BEST FAN ARMY of 2012!

OK guys, we need to take a look around for a second -- is it SERIOUSLY December right now? How did that happen? I guess it makes some sense, because so much has happened this year: so many breakups, so many hookups, so many nearly n00d Instagrams, SO much fandamonium. (Thank GOD for Twitter, because where else could we obsess about One Direction and Bieber and Gaga and Rihanna and everyone else all day?)

But in case you were too busy tweeting about Demi Lovato and Adam Lambert this year, we're going take a look back and celebrate the year in music and pop culture that was 2012, AND we're going to be crowning one superstar's fans the title of Best Fan Army. It all goes down on a very special live stream called "The Big & Best of 2012: A Year End Celebration Presented by T-Mobile," and it's all happening on Wednesday, Dec. 12. Which also happens to be 12/12/12 at 12 p.m. E.T.!

There are more than a few important reasons to tune in, ESPECIALLY if you live and breathe by the code of a fan army, and you probably do if you're reading this.

See how you can join the competition to become the Best Fan Army, and get 12 VERY GOOD reasons to watch "The Big & Best Of 2012" live stream on 12/12/12 at 12 p.m. ET!

1.) "LAST FANS STANDING: THE BEST FANS OF THE YEAR'" WILL PROVE WHICH SUPERSTAR HAS THE BEST FAN ARMY! Fan armies, this is what we're talking about! We're talking to Katy Perry's Katycats, Rihanna's Rihanna Navy, Lady Gaga's Little Monsters, The Wanted's TWFanmily, Taylor Swift's Swifties, Selena Gomez's Selenators, One Direction's Directioners, Justin Bieber's Beliebers, Nicki Minaj's Barbz, Adam Lambert's Glamberts, Bruno Mars' Hooligans, Demi Lovato's Lovatics, Chris Brown's Team Breezy and a handful of others. We are going to prove which fans are the best in a social media challenge to declare once and for all which fan army is the most intense. So keep your eyes directed here to learn how to represent your crew!

2.) CARLY! RAE! JEPSEN! Carly Rae Jepsen who had the breakout year to end all breakout years, will be there to reveal her top five moments of the year. Certainly we have an idea of what one of them HAS to be: splitting Pop-Tarts with Austin Mahone and Boys Like Girls!

3.) GRACE POTTER WILL BE PERFORMING, THIS TIME WITHOUT HELIUM! Grace Potter, when she's not performing on Big Morning Buzz or singing covers with helium at the OMAs, is an amazing artist who will be performing on "The Big & Best of 2012"!

4.) METRIC WILL BE PERFORMING, SO YOU CAN GET A "DIVAS LIVE" PREVIEW! Metric, who were recently added to the already-loaded bill at "Divas Live," will also be performing for the entire world in this live stream. No word on whether or not their set will be performed underwater.

5.) ALT-J WILL PERFORM! Mercury Prize-winning Alt-J will premiere their MTV Hive "Live In Boston" performance. So get ready to pick your brain up off the floor.

Get even more reasons to watch "The Big & Best Of 2012" live stream on 12/12/12 at 12 p.m. E.T. after the jump!

6.) THOMPSON SQUARE AND FIRST AID KIT BOTH WILL PERFORM LIVE! Country/folk Thompson Square and First Aid Kit will help us celebrate the year that was 2012, but in an "acoustic/down-home" sort of way and not like the "super embarrassing, don't tag me on Facebook" kind of way.

7.) DUSTIN LYNCH IS PERFORMING A SURPRISE DUET! Seriously, it's like a mystery flavor of ice cream, but it's a country duet with Dustin Lynch, and the mystery is probably a superstar that will blow us away. Can't wait for this!

8.) SWAY ALL DAY! MTV News' Sway Calloway, VH1's Carrie Keagan and CMT's Kourtney Hansen will be broadcasting live from MTV's famous Times Square studio! Tune in to see which hat he'll wear!

9.) OUR FRIENDS FROM MTV2'S "GUY CODE" ARE PARTICIPATING IN A SCAVENGER HUNT IN TIMES SQUARE! Damien Lemon, Andrew Schultz, and Melanie Iglesias from MTV2's "Guy Code" will be running around frantically in New York's busiest cross sections, probably making a fool of themselves, all for your entertainment.

10.) THE BEST MUSIC AND POP CULTURE MOMENTS OF THE YEAR ALL OVER AGAIN! Remember the crazy moments from the VMAs? When you found out that Beyonce and Adele's babies were born? Rihanna's allergies to clothing? There will be trained experts (aka Comedy Central's "The Colbert Report," VH1's "Big Morning Buzz Live" and "You Oughta Know," MTV News' "RapFix Live" and "After Hours," MTV Hive's "Live in Boston," CMT's "Live in Nashville," "Live@CMT," and "Concrete Country," oh and us too) to help jog your memory, y'know, just in case you forgot.

11.) MORE SURPRISE GUESTS! We could tell you who, but then it wouldn't be a surprise.

12.) YOU'LL HAVE SOMETHING TO TALK ABOUT OVER WINTER BREAK! The first few days off are GREAT. You sleep in, eat whachoo want, watch TV, maybe catch up on all those books you said you already read. But then it starts to dawn on you: You're bored and probably have nothing to talk about. Well, we guarantee if you watch 8 hours of a live stream recapping 2012, you'll have something interesting to say! Much better than "How's the weather?"

"The Big & Best of 2012: A Year End Celebration Presented by T-Mobile" goes LIVE at 12 p.m. ET on 12/12/12. Watch at BigAndBestOf2012.com for eight hours of live performances from stars like Bruno Mars and Miguel, special editions of "RapFix Live" with Ma$e and A$AP Rocky, "Big Morning Buzz Live," "MTV After Hours" with Norman Reedus, "You Oughta Know," surprise guest appearances, prize giveaways and much much more!

Stick with MTV as we count down the Best of 2012, including the Best Songs of 2012, Live Performances, Movies and EDM Videos of the year.