"Mr. Walker, It's All Over" is a song written by Gene Crysler that was originally recorded by American country artist, Billie Jo Spears. It was released as a single via Capitol Records and reached the top ten of North American country charts in 1969. It also reached charting positions on the North American pop charts. The song described how a New York City secretary fought sexual harassment and discrimination in the work place. It became Spears's breakthrough commercial success and was followed by a corresponding album of the same name.

Billie Jo Spears was an American country music singer. She was known for a series of singles whose characters often represented women in assertive positions. Among these recordings was a song about sexual harassment, and a song about rekindling sexual desire ".