Madonna is wealthiest female singer. The singer is said to be worth more than a billion dollars. The money comes from not only music sales and concert tours, but from clothing and other business ventures. Celine Dion came in second at more than 600-million-dollars, credited to her music career and Vegas residency as well as owning fast food chain, Nickels. Mariah Carey comes in third with more than 500-million-dollars from music royalties and concerts. Gloria Estefan and Dolly Parton come in at four and five respectively.