Dolly Lenz reigns as the queen of U.S. real estate.
As owner and operator of Dolly Lenz Real Estate LLC in New York City, she has moved more than $7 billion in real estate.
That's more than double the next top agent in the country.
Lenz attributes her success to long-term relationships. She figures 60% of her business comes from referrals or repeat clients. They include many foreigners, thanks to her fluency in French, Italian, Portuguese and Spanish — her first language.