Female singers dominated the top of Forbes' list of the highest-paid celebrities under the age of 30, starting with country pop sensation Taylor Swift.

The business magazine said the 22-year-old Swift earned 57 million dollars in the 12 months to May, a period that included the North American and Australasian legs of her 111-concert "Speak Now" tour.

Forbes said each Swift concert raked in an average of 1 million dollars, with multi-platinum album sales and product endorsements topping up her wealth.