One of Natalia Vodianova's ads for Calvin Klein. Calvin Klein Natalia "Supernova" Vodianova is probably best known for her work as the face of Calvin Klein's Euphoria perfume.

Vodianova, 33, is the fifth-highest-paid model in the world, but she has used her fame to promote nonprofit causes that are close to her heart.

In 2004, she set up the Naked Heart Foundation, which supports families raising children with special needs and seeks to create an inclusive and inspiring environment in which to play for every child in urban Russia and internationally.

And this year she became a tech entrepreneur by launching Elbi, an iPhone app that lets people donate small amounts of money to good causes and interact with the people and charities who receive the money. The name stands for "Little Big" (LB), and the philosophy behind it is that you can make a big difference through little actions. Download the app here. Elbi's advisory board includes Jimmy Wales (Wikipedia founder), Michael Birch (Bebo founder), Arianna Huffington (Huffington Post), designer Diane von Furstenberg, and Brent Hoberman (cofounder of Lastminute.com and Made.com).

Business Insider asked Vodianova to show us, in words and pictures, what a typical day in her life is like. Here's what she came back with.