Police said employees of the salon, at 140 Woodbridge Ave., called just before 11 a.m. reporting a car had driven through the front window of the store.
The injured woman wasn't hit by the car, but flying glass cut her leg. Police said she was transported to a nearby trauma centre with non-life threatening injuries.
The 60-year-old woman driving the car, a gold-coloured Mercedes sedan, was not injured.
Police said it's not immediately clear how the crash happened, but said there's nothing to indicate alcohol was involved.