Paul McCartney

A musical lineup that ranges from Bjork to Wu-Tang Clan to Dwight Yoakam might seem far-fetched under other circumstances, but such variety is the hallmark of the Bonnaroo Music & Arts Festival.

Now in its 12th year, the four-day jam fest in Manchester, Tenn., will feature Paul McCartney, Mumford & Sons and Tom Petty & The Heartbreakers among its headliners.

Also among the 100 or so artists set to perform are R. Kelly, The Lumineers, Nas, Preservation Hall Jazz Band, Solange, Billy Idol, ZZ Top, "Weird Al" Yankovic, Sam Bush and Del McCoury. A dozen comedians also will be on hand, including Daniel Tosh and Bob Saget.

Pulling double duty is Ed Helms, the banjo-playing "Office" staffer on NBC and co-star in "The Hangover" movies. Helms will offer a comedic Whisky Sour Radio Hour as well as a musical Bluegrass Situation Superjam with special guests.

The Bonnaroo Cinema, the one place that's air-conditioned, will showcase new films, classics and documentaries, some accompanied by live performances, such as Polyphonic Spree's "Rocky Horror Picture Show" concert, followed by the film screening. Actors making appearances include Michael Winslow of "Police Academy" and Thomas Lennon and Robert Ben Garant, better known as Lt. Jim Dangle and Deputy Travis Junior, of "Reno 911."

The festival opens today, June 13, as thousands of campers file into the 700-acre site. The big-name acts play Friday-Sunday, June 14-16. Music starts each afternoon and lasts into the wee hours of the morning.

At press time, only one price level of tickets was available, $269.50, plus $26.30 in fees.

Find out more at www.bonnaroo.com.