John Frieda is no stranger to launching effective products for all hair types. The drugstore haircare brand is a household staple . . . especially among curly haired gals (hello, Frizz Ease). Now the ...

Gail Federici sold her first company, John Frieda Hair Care, in 2002. She’s more than doubled her fortune building a second brand, Color Wow, which is now eyeing a $1 billion sale. After selling her ...