Riot Fest

An estimated 30,000 people gathered in Humboldt Park proper on day one of the 2013 Riot Fest.

Day one of Riot Fest Kicked off Friday with Butter Stamos and punk acts on the West Side.

Jim Victor said John Stamos' famous hair is the inspiration behind Riot Fest's popular draw.

The rock festival features acts including the Replacements - and the John Stamos butter sculpture.

Here's what you need to know about 2013 Riot Fest this weekend.

The music fest and carnival takes place in Humboldt Park Friday through Sunday.

No bringing in your own food, and you can't come and go at this year's fest.

Riot Fest organizers announced the schedule for this weekend's fest.

Those who bought tickets for the Aug. 16 Congress Theater show will get refunds, the promoters said.

Some rock and roll fans complained that Ticketfly crashed after Wednesday's Riot Fest sale began.

Organizers announced Friday that Motorhead had to cancel due to "unforeseen circumstances."

The fate of the concert had been uncertain as the Congress Theater remained closed.

Alt-rock pioneers The Replacements will reunite in Humboldt Park in September.

Riot Festival co-founder Mike Petryshyn watched his small punk fest turn into a big Chicago attraction.