Episode: Lyft: John Zimmer

A decade ago, full-time mom Alli Webb noticed a gap in the beauty market: there was no place that just focused on blow-drying hair. Now with more than 100 locations, Drybar is testament to Webb's motto: Focus on one thing and be the best at it. PLUS in our postscript "How You Built That," we check back in with Chris Healy, a long-haired Southern Californian who co-founded The Longhairs and created special hair ties for guys.

Steve Madden fell in love with the shoe business in the 1970's, when he sold platform shoes at a neighborhood store in Long Island, New York. That was in high school. About 15 years later, he struck out on his own, designing and selling shoes with a high-end look at affordable prices. As his business – and his ambitions — began to grow, he got involved in a securities fraud scheme and wound up serving two and-a-half years in prison...

Lisa Price worked in television but had a passion for beauty products. At her mother's suggestion, she began selling her homemade moisturizer at a church flea market. Twenty years later, Carol's Daughter is one of the leading beauty brands catering to African-American women. PLUS in our postscript "How You Built That," we check back in with Aiden Emilio who, along with her husband Jesse, created RexSpecs — UV-protecting goggles for dogs.