Last week, number 10 on the country billboard charts was “Follow Your Arrow” by one Kacey Musgraves. If you didn’t know it, Kacey had a smash year with her debut solo album Same Trailer, Different Park and also managed to write a couple more of the best songs of late for other artists (see: “Mama’s Broken Heart,” which I somewhat desperately insisted was available on Sunfly Karaoke to a KJ last night – it was…