Post Malone had a busy Friday the 14th at Bonnaroo.
The New Yorker turned Texan headlined the Friday night slot at the incredibly stacked festival in Tennessee, and not that he needed it, but he got a little help from a friend.
About half way through his set he called up Billy Strings who was in town to perform on Saturday.

Together the two jammed on two tunes and it was a delight.
`When the extended Father's Day Weekend includes big acts like The Red Hot Chili Peppers, Fred Again, Pretty Lights, Four Tet, Carly Rae Jepsen, Brittany Howard, Megan Thee Stallion, Armand Hammer, Faye Webster, Khruangbin, Yves Tumor, Idles, Ethel Cain, Chappell Roan, Maggie Rogers, Thundercat, Diplo, Cage the Elephant and so many others, it's good to have a special guest jump on stage and shred.

With flames dancing at the front of the stage and more fire further back, a shirtless Post Malone ran around singing "rockstar" while Billy Strings fiddled with an acoustic guitar which was drowned out by the orchestra and DJ and drums surrounding him.
More flames shot up from in front of the stage. An audience member held up a mop for some reason.
Why was the bluegrass guitarist there for that song?
Even stranger was during the guitar solo, Post's electric guitarist played her part then Malone screamed, "Billy Strings, come on!"
But Billy was still drowned out.
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When "rockstar" was over, most of the musicians left the stage to take a break, Post was handed an acoustic guitar and it was just he and Strings left alone to play the tender "Stay."
Without all the cacophony the Bonnaroo crowd got to enjoy the virtuoso who lived up to his name.
"Make some noise for the best guitar player on the [freaking] planet, ladies and gentlemen," Posty said, and the crowd made some noise.
It wasn't the first time the pair had jammed together on stage.
In 2022 it was Post who joined Billy and his band to cover the Johnny Cash classic "Cocaine Blues" at The Observatory in Orange County near Disneyland.
As you probably know, last month, Posty announced he will be dropping a full blown country album by the end of the year. In April he did a whole country covers set at Stagecoach with several stars of the genre.
Then at the Academy of Country Music Awards last month, he live debuted "I Had Some Help," a tune he recorded with Morgan Wallen that went to the top of the charts.
Posty saved that one for second-to-last in his Bonnaroo set.
But then yesterday on Father's Day, Post posted a sneak preview of a song that will be a sure-fire go-to tear jerker at Bible Belt weddings of the future.
The untiled song is clearly inspired by his nearly two-year-old daughter and how he imagines he will feel when she gets hitched.
When I walk her down that aisle
And do what daddies have to do
And she might be wearing white,
But her first dress it was pink
She might be your better half
Yeah, well, she’s my everything
Post Malone only has three more North American gigs scheduled this summer.
Go to his website to grab the few remaining seats that are available.
Leave your mop at home.