Hooray for Our Side, sometimes abbreviated to H4OS, is a ska punk band based in Orange County, California, that formed in 2010. The current lineup consists of Evan Wohrman on lead vocals, Katon Guinen on lead guitar, Kevin Heydman on bass guitar, Corey Simmons on trombone, Drew Pedersen on trombone, Branden Herron on sousaphone/trombone, and Keith Roberts on drums. H4OS was formed by Nikki Klein, Peter Stoia, and Evan Wohrman following their departure from Orange County ska band Time to Renew in November 2010. Katon Guinen joined in as the group's original bassist before taking over guitar duties in 2011. The group added a horn section in 2013, with trumpet player Stefan Kehlenbach and trombonist Corey Simmons. Bassist Christian Gutierrez joined the band later that year. The band released their self-titled EP, produced by Vincent Walker of Suburban Legends, on August 6, 2013. Former members of the band include Peter Stoia on lead guitar from 2010 to 2011, Veg Crash McCoy on bass from 2011 to 2013, Nikki Klein from 2010 to 2014, and Stefan Kehlenbach on trumpet from 2013 to 2014. Read more on Last.fm. User-contributed text is available under the Creative Commons By-SA License; additional terms may apply.