Watch the best performances from "The Big & Best of 2012" right here!

FINALLY, "The Big & Best Of 2012" is here! We don't really have to tell you, but get ready, guys. We will be streaming a billion goodies LIVE all day from noon to 8 p.m. ET. No need to take a break (okay, maybe to use the bathroom, but DEF think ahead and order some take out). Just a reminder for what's in store: We've got Bruno Mars, Miguel, Metric, A$AP Rocky, Grace Potter, Alt-J, Thompson Square, First Aid Kit and Dustin Lynch all performing. Wow, that's a mouthful.

Keep it locked to Buzzworthy as we'll be updating all day with performances by favorite artists, y'know, just in case you were at the door paying the pizza guy.

Watch "The Big & Best Of 2012" after the jump!

+ Watch "The Big & Best Of 2012"

+ Watch the undeniably sexy and talented Miguel perform his Grammy-nominated Song Of The Year candidate "Adorn" and be sure to also watch him perform "Do You" and "The Thrill."

+ Check out the leader of the A$AP Mob, A$AP Rocky perform "Peso," and also see his performances of "Goldie" and "Long.Live.A$AP."

+ "VH1 Divas" performers Metric took the "You Oughta Know" stage to perform "Breathing Underwater." Also, don't miss their performance of "Synthetica."

+ Alt-J rocked in Boston with a fuzzed-out performance of "Breezeblocks." Their concert featured a lot of their breakthrough album An Awesome Wave, with songs like "Tessellate" and "Something Good."

+ Bruno Mars stopped by to talk about his new album Unorthodox Jukebox and perform his new single "Young Girls." Also, check out Bruno doing "Locked Out Of Heaven."

"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.