Brandi Carlile is having a full circle moment! The country superstar made her debut as the musical guest over the weekend, and shined bright in both her sets.Carlile took the stage for her first number rocking a gold tuxedo and belted out her song «Broken Horses» into a golden mic.Flanked by twin backing guitar players -- Phil and Tim Hanseroth — Carlile brought a rock-star energy and emotional depth to Studio 8H that proved to be a powerhouse of a debut performance.For her second set of the