It's time to get back to the 'Roo.
The 2013 Bonnaroo Music & Arts Festival kicks off on Thursday, June 13 and based on the smorgasbord of artists set for this year's edition, expect a whole lot of shakin' going on down on the farm in Manchester, Tenn.
E! News runs down the five-must see acts you can't miss:
1. Paul McCartney: The former Beatle takes the What Stage on Friday, June 14, his first time headlining the formerly jam-oriented festival, which has embraced all genres of music in recent years, most notably electronica. In Macca's case, he's expected to dig deep into the Fab Four's catalogue, along with playing gems from Wings and his still-going-strong solo career.
2. Alt-J: The English quartet won the 2012 British Mercury Prize for their debut album, An Awesome Wave, which won praise for mashing up hip-hop beats with folk, trip-hop, electronica, and indie rock. Be sure and catch their Thursday set at the This Tent.
3. Macklemore & Ryan Lewis: The Seattle-based duo have emerged as a hip-hop force to be reckoned with their debut studio album, The Heist, shot to No. 2 on the Billboard charts and their hit, "Thrift Shop" took the top spot. They're scheduled to play Sunday.
4. Mumford & Sons: Despite their bassist, Ted Dwane, being hospitalized this week for a blood clot on his brain and having to undergo emergency surgery, the English folk rockers are still scheduled to headline Saturday night with a two-hour late-night performance. Singer Marcus Mumford and crew will no doubt play ditties from their two critically acclaimed records, Sigh No More, and Babel, which won an Album of the Year Grammy a few months ago.
5 Björk: The Icelandic singer will bring her signature eclectic sound and swooning voice to the masses with a Saturday evening set that will deliver pop gems from her two decade-plus career. Expect everything from her big band and jazz-inflected songs to new cuts off her latest work, Biophilia.
Other notable artists playing Bonnaroo this year include Tom Petty & the Heartbreakers, R. Kelly, ZZ Top, Cat Power, The National, Kacey Musgraves, Wilco, Jason Isbell, Wu-Tang Clan, Tallest Man on Earth, The Vaccines and Grizzy Bear among many others.
Oh, and Hangover and Office star Ed Helms Bluegrass Situation Superjam is definitely something we want to see.