"The Big & Best Of 2012" CANNOT be missed, guys.

So juuuuust to make sure, in case you've been in the woods for the past couple weeks or something, we're officially reminding you to tune in to "The Big & Best Of 2012" live stream that's going down TODAY, 12/12/12, at 12 p.m. ET. (Not a coincidence, guys). There are so many performances on "The Big & Best," it's almost too exhausting to list, but we must. There will be performances from Bruno Mars, Miguel, Metric, Alt-J, Grace Potter, First Aid Kit, Thompson Square, and Dustin Lynch with a surprise duet. And that's not even mentioning Carly Rae Jepsen stopping by to reveal her top five moments of the year.

Learn more about today's "Big And Best Live Stream after the jump!

Also, the top seven fan armies moving on to the next round of "Last Fans Standing: The Best Fans Of The Year" WILL BE REVEALED. So you'll def need to tune in for that. (But keep sharing guys!) Also, we'll be showing a sneak peak of Taylor Swift's new video "I Knew You Were Trouble." Oh, and we haven't even mentioned so many of our faves from MTV, VH1, MTV2 Comedy Central, CMT, and more will be helping us relive the craziest and best moments of the year for eight hours. We. Will. Not. Stop. Seriously, you guys: You need to tune in for this one.

"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.

Photo credit: Getty Images/MTV