Cowboy from Brooklyn

Cowboy from Brooklyn is a 1938 American musical comedy film starring Pat OBrien, Dick Powell, Priscilla Lane, Ann Sheridan and the future US President Ronald Reagan.

Meanwhile, Jane and some of the ranch people are traveling East as well so Sam can sing on Captain Roses Amateur Hour in New York. Jane tells Sam that she is in love with Elly and Sam is so angry that when he isnt a big success on the show, he blurts out the truth about Ellys background. To prove that Elly is on the level, Chadwick and his assistant Pat Dunn suggest that he compete in a rodeo. They take Elly to Professor Landis, who hypnotizes him. Under hypnosis, Elly leaps on a horse, rides to Madison Square Garden, enters the bulldogging contest and sets a new record. He sneezes and wakes from the hypnosis, but the movie people are convinced that he is a real cowboy. He signs the contract and kisses Jane to seal the deal.

Source: Wikipedia