Organized by MTV and the former U.S. president's Clinton Global Initiative, the star-studded summit is to take place Sept. 29 at the Apollo Theater in Harlem.

As part of the special event, "CGI and MTV present: Giving -- Live at the Apollo," each individual will talk about their efforts to influence change on pressing social issues.

They will also invite young people to join with them on a new initiative designed to improve communities and make a difference in the lives of people living in the world's poorest places, MTV has said.

To be moderated by MTV News correspondent Sway Calloway, the discussion and concert will be Web cast live on Think.MTV.com, ONE.org and keepachildalive.org, with a special on the day's events to be broadcast later on MTV, mtvU and MTV Tr3's.