Saw him again today...we converged on the intersection of Mt Vernon and Commonwealth. He was in his standard "Safeway Management" attire. Button down short sleeve shirt with tie and dockers. It was hard to make out the song choice for today, as it was hard to hear as I followed him on to Four Mile Run trail.
Of note, there is a 2nd Singing Fred. Last week, a guy wearing a short sleeve blue shirt, tie and khaki shorts pulled up next to me at the same intersection belting out a tune. He was still singing when I lost him by the airport. I couldn't tell if his attire was a joke, or if he was wearing "Safeway Casual" with his choice of shorts.