Musgraves, the former teenage Nashville Star contestant turned Leader Of Country’s New School, eased through the first half of her set pleasantly enough. Backed by men wearing blue nudie suits garnished with Christmas lights instead of rhinestones, she smiled demurely from under her floral crown and kicked her white cowboy boots into songs she wrote for her own great Same Trailer, Different Park and for fellow forward-thinking sassy lass Miranda Lambert (“Mama’s Broken Heart”). Things really got cooking, though, for the last four songs. Musgraves and the boys burned through a cover of “These Boots Are Made For Walkin’,” followed by a run through hit “Merry Go Round” with Musgraves on banjo that had the entire audience singing along. It seems that chronicle of small-town stasis is even more dearly beloved by Musgraves fans than her signature song, the clever do-it-your-way manifesto “Follow Your Arrow,” which followed in quick succession. Then they all put down their instruments and gathered at the front of the stage for a short, sweet a cappella finale. This time the crowd fell silent, letting Musgraves and company transform the Golden Gate Park hillside into someplace much smaller and cozier. -Chris