Joel Birch, vocalist of The Amity Affliction, was hospitalized today due to an unspecified illness, which also forced the band to cancel their scheduled appearance at yesterday's Warped Tour stop in Pittsburgh.

Rather than cancel again, the band chose to perform today at the Cleveland Warped stop with the help of Sam Carter (Architects), Jason Aalon Butler (letlive.), and Chris Roetter (Like Moths To Flames), trading off on vocal duties.

Check out a post from The Amity Affliction's Facebook, addressing the situation after yesterday's Pittsburgh cancelation:

"Hi all,

Apologies for having to pull out of our show in Pittsburgh, Joel was pretty unwell! He still won't be right to go by tomorrow but thanks to our bros, Sam from ARCHITECTS and Chris from Like Moths to Flames, we will be good to go for Cleveland. It will be a bit like Amity Karaoke so you'll have to scream along with them! We hope to have Joel back for Detroit! Once again sorry to everyone who missed seeing us today. Promise we will come back to Pittsburgh soon!"

We've reached out to the band for further comment on the details of Birch's condition, and will update once we know more about the situation. According to the band's statement, Joel was hopeful to perform at tomorrow's Detroit stop, but, in light of the singer's hospitalization, the prospect of that remains unclear.

Here's a photo we posted earlier, of Jason Aalon Butler filling in with the band in Cleveland:

It has been a hazardous Warped Tour for The Amity Affliction. Drummer Ryan Burt sustained an eye injury during the band's Portland, Ore. performance last month, and was replaced by Chad Hasty, of Glass CloudThe group are scheduled to appear on the entirety of Warped Tour.