“We become what we repeatedly do.” ~Stephen R. Covey Cher won’t stop singing “Dark Lady” inside my head. The pop tune — which was released in 1974 but happened to be playing on my car radio last week — now repeats itself on an endless loop in my mind while I’m drying my hair in the bathroom each morning. Then it starts all over again, later, while I’m chopping veggies in the kitchen. And it’s not like I’m a huge fan of Cher. What is it with sticky songs? According to my online research, sticky songs (otherwise known as “earworms”) have a scientific label: Involuntary Musical Imagery, or INMI. “According…