Avril Lavigne has been photographed on the red carpet (well, beige carpet) at the ACM Awards, wearing a black hoodie of a big metal band — System of a Down. The pop-punk princess posed individually and with country star Nate Smith, who released his self-titled debut last year. Although it’s difficult to see and is not shown unobscured, the System of a Down name occupies the top left part of the hoodie. Unfortunately, Lavigne’s flowing blonde hair mostly covers the logo, but it’s still pretty cool that there’s any sort of heavy metal represented at Country Music’s Biggest Night. There’s also a …