Possible Clues:

• U2 activist
• (PRODUCT) RED co-creator
• One of Time's 2005 Persons of the Year
• U2 rocker/activist
• Time magazine Person of the Year, 2005
• Cher's last name, once
• The only person to have been nominated for an Oscar, a Golden Globe, a Grammy and the Nobel Peace Prize
• Singer who is part owner of Forbes magazine
• Cher's married name; U2's singer
• Pro . . . . publico - for the common good