A singer, composer and actor, Lyle Lovett has broadened the definition of American music in a career that spans 14 albums. Coupled with his gift for storytelling, the Texas-based musician fuses elements of country, swing, jazz, folk, gospel and blues in a convention-defying manner that breaks down barriers. He performs at Boarding House Park, 40 French St., Lowell, as part of the Lowell Summer Music Series. Tickets start at $69.