Robert Lee Flanigan (August 22, 1926 – May 15, 2011) was an American tenor vocalist and founding member of The Four Freshmen, a jazz vocal group.
The Four Freshmen originated in early 1948 when brothers Ross and Don Barbour, then at Butler University's Arthur Jordan Conservatory in Indianapolis, Indiana, formed a barbershop quartet called Hal's Harmonizers.
Flanigan was a cousin of the Barbours and joined The Harmonizers beginning on September 20, 1948, becoming their lead vocalist.
In 1950, The Four Freshmen got a break when band leader Stan Kenton heard the quartet in Dayton, Ohio, and arranged for an audition with his label, Capitol Records, which signed The Four later that year.
Throughout the 1950s and early 1960s, The Four Freshmen released a number of recordings, made film and television appearances, and performed in concert.