June 12, 2014 7:00PM ET

Bonnaroo’s Greatest Country Music Moments

From Kenny Rogers jamming with Phish to Kacey Musgraves’ ‘Roo Debut, photos of country stars at the rock-heavy festival

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The monster of all festivals lives: Bonnaroo has begun. While A-list rock, pop and hip-hop names like Elton John, Jack White and Kanye West may rule the top of this year's lineup card, the eclectic festival, held 60 miles south of Nashville in Manchester, Tennessee, does showcase its share of country music. Chief among them: Dierks Bentley, a 2007 'Roo alumnus, is slated to burn a little 'grass as part of the Ed Helms' Bluegrass Situation Superjam on Sunday night. As the four days of live music, public intoxicants and increasingly dirty tents roll on, Rolling Stone Country looks back at some of the most memorable country moments — Kenny Rogers jamming with Phish! — that festival-goers are almost certain happened.

Kenny Rogers performs with Phish at Bonnaroo

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An awesomely unusual pairing on "The Gambler": the legendary Kenny Rogers is joined by iconic jam band, Phish, for his classic tune.

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Lambert performed hits including "Kerosene" and "Heart Like Mine" during her first visit to Bonnaroo.

Sam Bush and Dierks Bentley play Bonnaroo

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Bentley released an entire Live From Bonnaroo album, with recordings from his 2007 performance. Lauded musician Sam Bush joined him for the bluegrass-heavy set.

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Zac & Co. are two-time Bonnaroo performers, fitting right in with the rest of the festival's jam bands.

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The two lauded songwriters performed together in 2010, with the audience singing along to every word of both Kristofferson's "Help Me Make It Through the Night" and Johnson's "In Color."