Making his Grand Ole Opry debut wasn't the only special moment Parker McCollum experienced this weekend. In addition to performing his #1 debut single "Pretty Heart" and delivering a cover of Jerry Lee Lewis ' "Middle Aged Crazy," Parker was also surprised with a plaque commemorating platinum certification of "Pretty Heart" by the RIAA. "Playing the Grand Ole Opry for the first time and dreaming about playing country music for a long time, it is an unbelievable feeling to stand right here and sing my song for you guys," Parker professed, standing in the sacred Opry circle after perf...