Maurice Chevalier

Maurice Auguste Chevalier (September 12, 1888 – January 1, 1972) was a French actor, singer and entertainer. He is perhaps best known for his signature songs, including Louise, Mimi, Valentine, and Thank Heaven for Little Girls and for his films, including The Love Parade and The Big Pond. His trademark attire was a boater hat, which he always wore on stage with a tuxedo.

source: Wikipedia