Calexico's Joey Burns, Sarah Harmer, Jason Collett Lead All-Star Jam at Hillside Festival

"I hope someone is recording this," Joey Burns told the soggy Saturday afternoon crowd at Guelph's Hillside Festival.

Dubbed the Colossal Jam, the late afternoon event saw the Calexico frontman -- along with singer-songwriter Sarah Harmer and Broken Social Scene's Jason Collett -- lead an all-star band through a bevy of unrehearsed numbers.

Collett called out chord changes before launching into 'My Daddy Was a Rock and Roller,' while Harmer led the band through a pretty version of 'Silverado' from her latest disc 'Oh Little Fire.'

Afterward, Burns turned towards the crowd and gushed, "This is the first time I've met her. Doesn't she sound wonderful?" The crowd roared its approval.

The trio shared vocal duties on a rendition of Bob Dylan's 'Gotta Serve Somebody,' leaving plenty of room for the seven-piece backing band -- a hodgepodge of members from Los Lobos, Calexico and Hidden Cameras -- to shine.

Joey Burns, who was born in Montreal, took a moment to praise the Hillside Festival for its commitment to great music and the environment, calling the long-running folk festival "one of the best events of its kind."

The crowd agreed. Despite foul weather, festivalgoers remained in high spirits and didn't seem to mind that unforeseen scheduling conflicts delayed the performance by an hour. When the big band finally hit the stage, the rain subsided. Audience members stored their umbrellas and took to dancing in the mud.

By the time the jammers closed out the performance with an extended and driving rendition of the Minutemen's 'Jesus and Tequila,' the crowd was having too much fun to notice the rain had returned.