The Simpsons will again venture to Iceland in its upcoming season finale, and Sigur Rós has been tapped to guest star and contribute original music. In what should be an interesting way to close out the animated comedy's 24th season, the two-part finale will follow Carl Carlson (who's said to have roots in Iceland) on a trip back to his native country. Somehow, that leads to an appearance by the post-rock band.

Seattle's Bumbershoot Festival has announced its 2013 lineup. The event, which takes place Aug. 31 to Sept. 2 at Seattle Center, will include Death Cab for Cutie performing Transatlanticism, Kendrick Lamar, MGMT, Tegan & Sara, The Zombies, Alt-J, Deerhunter, Crystal Castles, Gary Numan, Joey Bada$$, Eric Burdon, Bob Mould, Charli XCX, Heart, Matt and Kim, Ra Ra Riot, The Joy Formidable, Allen Stone, ZZ Ward and more.

Ahead of Tuesday's lineup announcement, Austin City Limits Music Festival has teased some of the roster by placing a series of mysterious ads in local newspaper The Austin Chronicle's classifieds section this week. The ads reveal fun., Grouplove, Shovels & Rope and True Believers as performers during this year's two-weekend fest, which runs Oct. 4-6 and Oct. 11-13 in Austin's Zilker Park.