Let Me Call You Sweetheart (1932)

Betty Boop, a nursemaid, meets a masher in the park; with the Bouncing Ball, Ethel Merman sings the title song. IMDB.

Popeye The Sailor (1933)

Popeye begins his movie career by singing his theme song, demonstrating his strength at a carnival, dancing the hula with Betty Boop, pummeling Bluto, eating his spinach and saving Olive Oyl from certain doom on the railroad tracks. IMDB.

April Maze (1930)

April Maze is a 1930 short animated cartoon featuring Felix the Cat. It was produced by Pat Sullivan. Wikipedia

Steamboat Willie (1928)

Steamboat Willie is a 1928 American animated short film directed by Walt Disney and Ub Iwerks. It was produced in black-and-white by Walt Disney Studios and was released by Celebrity Productions. Wikipedia