Three years ago to the date, Jon Bellion played to a “small” crowd of no more than 100 people at The Rock in Tucson, Arizona. Friday night (July 5), thousands flocked to Comerica Theatre in the heart of Phoenix to support the New York musician. Rounding off the second week of the eight-week long “Glory Sound Prep” world tour, he declared Phoenix the best audience yet. The night also served to announce the launch of Jon Bellion’s new label, Beautiful Mind Records. Boston readers can get in on the action and see the label’s first signed artist, Lawrence, open up the show August 6 at Rockland Trust Bank Pavilion.