MANCHESTER, TN - JUNE 15: Jack Johnson performs at What Stage during day 3 of the 2013 Bonnaroo Music & Arts Festival on June
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Mumford & Sons may have had to cancel their headlining appearance at Bonnaroo 2013 after bassist Ted Dwane underwent brain surgery, but their replacement Jack Johnson ensured they were not forgotten. 

Midway through his 26-song set, the singer-songwriter covered Mumfords' 2010 hit "The Cave" to rapturous applause. Earlier in the show, Johnson dedicated his performance to "Ted Dwane and all of Mumford & Sons," adding, "And we wish we could all be here playing music together. Maybe that will be next year." The singer also expressed his desire to perform with the band while talking to Fuse News earlier in the day. 

The two-hour set, which included a cover of Steve Miller Band's "The Joker" and new song "I Got You," also featured "Bonnaroo," a song Johnson wrote Saturday morning about the festival itself. On it, the singer relayed to the crowd how a guest appearance turned into a headlining set.

"I had a late-night gig with ALO," sang Johnson. "It was very low stress, it was very low pro/But then the phone rang and things got strange/And my low pro was about the change/Can you get the band together in two days to play a show up on the big stage?/But I don't know, it's been a year or two since we played these tunes/What the hell, it's Bonnaroo."

On Thursday, Mumford & Sons announced that Dwane had been discharged from the hospital following surgery, but that they needed more time before playing additional shows. Johnson noted on his Facebook page earlier this week that he had "a lot of lyrics and chords to relearn by Saturday night. I was here to play the first Bonnaroo and it is a very special festival to my band."