Updated, 5:15 p.m. Saturday:

In a post on the Dillo Day Facebook page, Mayfest declined to comment on the leak.

“In response to the recent Dillo Day related activity on the interwebs: Unfortunately Mayfest cannot comment at this point in time,” the group wrote.

Original story:

California-based rock band Smash Mouth posted an announcement Friday afternoon leaking a Dillo Day performance.

The band, which came to fame in the 1990s with popular songs such as “All Star,” announced a Northwestern concert at 1 p.m. June 1, the date of Dillo Day, on Facebook’s concerts application.

Mayfest was not immediately available for comment.

— Joseph Diebold