Mimi Pham and Zappos.com CEO Tony Hsieh (Photo by Michael Kovac/Getty Images for Vanity Fair)

Mimi Pham and Zappos.com CEO Tony Hsieh (Photo by Michael Kovac/Getty Images for Vanity Fair)

Mimi Pham and Zappos.com CEO Tony Hsieh (Photo by Michael Kovac/Getty Images for Vanity Fair)