Before Andy Grammer made his national debut in 2011, the singer/songwriter/multi-instrumentalist was at turns getting a crash course on entertaining a crowd from his father, Red Grammer (a Grammy-nominated children’s recording artist), or busking on the streets of Santa Monica, hoping to be discovered. And once he was, the floodgates of fame flew wide open, from the platinum-selling smash “Keep Your Head Up” and its equally contagious follow-up “Fine by Me,” to tour dates alongside Train, Gavin DeGraw, Colbie Caillat, Plain White T’s, Natasha Bedingfield, Mat Kearney, and Parachute, among others.