It's official: Blink-182 are back! The pop-punk trio played their first show in four years Thursday night in Los Angeles, and now the band have unveiled the tour dates for their summer outing with Weezer, Fall Out Boy, and others!

"Hello!" yelled Mark Hoppus from a stage at Los Angeles' Paramount Pictures lot Thursday night. "We are Blink-182 and this is our first show together after four years of hating each other's guts!" (See a photo gallery of the show here.)

Judging by their geeky fashion sense alone, Weezer frontman Rivers Cuomo and The Office star Rainn Wilson go together like pocket protectors and.... pockets. Which is why their musical collaboration, captured on video below, is pretty phenomenal.

Without a doubt, the return of Guns N' Roses -- even if only the "Rose" part resembles the original band of hooligans who once welcomed us to the jungle -- was the most popular news story of the year on SPIN.com. Metallica's back-to-basics new album and tour wasn't far behind.

We've already revealed our most important albums, songs, and videos of 2008, but what music garnered your interest this year?

Before we start shopping for New Years' Eve noisemakers, SPIN's staff compiled our picks of the year's best records, songs, and videos. But this week wasn't all looking back, as Fall Out Boy dropped a new record, U2 planned for theirs, Oasis visited New York City, and Weezer dropped a musical holiday treat. Check out the week's top news, MP3s, videos, and more: