the company called on people to put on their favorite jeans and donate $5 for breast cancer research. Lee also invited the participation of celebrities: Zac Efron, Christine Applegate, Billy Ray Cyrus, Mariska Hargitay, Steve Carrel, Jessica Simpson, Lucy Liu and others. The annual Denim Day has raised more than $83 million in 15 years, making it one of the largest single-day fundraising events.