Mary Hart Celebrates Hope and Achievement

ET's Mary Hart hosted a very special event in Hollywood on Tuesday night.

Mary hosted "A Celebration of Hope and Achievement: An Evening Inspired by Those Who Serve and the Lives They Transform," as part of City Year and the Entertainment Industry Foundation's (EIF) National Leadership Summit.

"I think it's vital," Mary said of volunteering. "I think that in a day when information is at our fingertips, in our ears, buzzing in our pockets, on our hips, wherever it is, every second of the day, it can be all about a lot of the wrong things. But when you take the time to give of yourself, to make the world a better place for somebody else, you're making the world a better place for yourself."