He became a cantor by the age of 11 and continued singing at religious services at various synagogues in the Greater New York area by the time his family immigrated to the US in 1930.
At age 16, Bart aspired to become a contestant on the renowned Major Bowes Amateur Hour radio show, a program broadcast in the United States during the 1930s and 1940s.
He won the contest and had the opportunity to travel around the country with the Major Bowes’[4] touring group,[5] thereby supporting his family during the Depression.
He was a member of ASCAP (The American Society of Composers, Authors And Publishers) starting with his own composition, "Ecstasy" that he penned at age 20.
His many television appearances included the Milton Berle Show and the National Muscular Dystrophy Telethon with Jerry Lewis.
[14] Throughout his life he continued to use his cantorial skills, conducting High Holiday services at the Riverside Plaza Hotel each fall and returning to the "Borscht Belt" (the Catskill Mountains of New York), where he, like many Jewish entertainers, had gotten his start, to conduct Passover services at Green's, Brown's, Young's Gap, and the Windsor hotels.
In 1941 Bart married singer Lillian Robbins, an operatic contralto, who performed as a soloist at Radio City Music Hall.
Their son Gary Bart (1946- ) is the founder of Weight Watchers of Orange County[22] and produced the films "In the Name of the People" and "Invincible".