Michelle Aguilar won NBC's "Biggest Loser" challenge and nine days later, she's making plans to marry.

Michelle's boyfriend of four months Micah Whitehead popped the question, she tells US magazine. "I was so shocked!" the 27-year-old says of the proposal.

Michelle lost 110 lbs on the show, making her the champion of the "Biggest Loser." She says she will "absolutely" be using some of her $250,000 in prize money to pay for the wedding.

The couple plans to wed in the fall of this year.