Congrats to Demi Lovato's Lovatics for winning "Last Fans Standing"!

We've had a looong day watching "The Big & Best of 2012," an all-day-long pop culture and pop music live stream, featuring performances by tons of our fave stars and pop experts recapping the craziest and most memorable moments of the year. We've also watched a very real and NASTY battle for "Last Fans Standing," a fierce fight where 16 different fan armies battled it out through a series of different "challenges." Now, we're sooo happy to congratulate Demi Lovato and all her Lovatics who shared via Facebook/Instagram, because they are officially the winners! You guys rawk at social media!

Read more about the "Last Fans Standing" win after the jump!

We should also congratulate Lady Gaga's Little Monsters and Britney Spears' Team Britney Army for their valiant efforts -- the two were placed second and third respectively. And a huge "YAY" to the other fan armies who fought in the race: KatyCats (Katy Perry), Rihanna Navy (Rihanna), TWFanmily (The Wanted), Swifties (Taylor Swift), Animals (Ke$ha), Directioners (One Direction), Beliebers (Justin Bieber), and more! And one more time, just 'cause: Congrats, Lovatics!

+ Watch the "Last Fans Standing" winner announcement!

"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.