Source: YouTube

Miranda Lambert treated the CMA Fest crowd to a special surprise on Friday night.  She brought Avril Lavigne on stage . . . and they performed a couple of songs together.

They started with Miranda’s “Kerosene” . . . and segued into Avril’s pop-punk classic “Sk8er Boi”.  (The video begins with Miranda promising to bring “more badass”.  “Kerosene” starts 0:23, and “Sk8er Boi” follows at 1:10.)