Justin Bieber sings Happy Birthday to empty stadium.

Justin Bieber sings live from the stadium "Happy Birthday"

Justin Bieber sings In this PSA for Cancer.

“I love the spirit of the American Cancer Society’s More Birthdays campaign because it celebrates life,” said three-time Grammy Award winner Keith Urban. “The marking of time, especially when spent with family and friends on that special day, helps to remind us of the little things that are most important to all of our lives.”

“I think it’s really important to support More Birthdays because the Society is helping out so much to save lives,” said multiple platinum singing sensation Justin Bieber. “Hopefully, me singing Happy Birthday to people through this effort will make them smile.”

“Thanks in part to the progress we’ve made, today we are celebrating 350 birthdays each and every day that would have been otherwise lost to cancer,” said John R. Seffrin, PhD, chief executive officer, American Cancer Society. “Now we are working relentlessly toward a world where we can celebrate tens of thousands more birthdays every day, and we need every tool at our disposal. We hope the support of these wonderful artists and musicians will capture the public’s attention and inspire them to help us make more progress and move us closer to a world where cancer never steals another year of anyone’s life.”