It's a little bit country, and a little bit rock 'n' roll. Actually, "punk-pop-a-billy" is the term they're using to describe MxPx side-project, Mike Herrera's Tumbledown. "I got into country music without even knowing it," Herrera tells Spinner. During a family road trip when he was a child, he heard Willie Nelson's 'On the Road Again' and began singing along. When it began to piss off his family, "I just kept on singing louder and louder, and when I got quiet for a few moments and they thought it was over, I'd burst back into the chorus with great joy that I was driving my family absolutely crazy!"

Herrera began writing Hank Williams-influenced songs back in the late '90s, and since then composed and recorded songs for Tumbledown during MxPx downtime. Mike Herrera's Tumbledown will drop its self-titled debut on May 19, with a tour to follow.

Commenting on the recent trend for rock stars to turn to new country and Nashville-style songwriting, Herrera jokes, "Didn't Darius Rucker sing his song on the TV show 'Nashville Star'? I may have heard it in passing, and it wasn't bad -- it wasn't country either, but then again, neither are we!"