Possible Clues:

• Time magazine 2005 co-Person of the Year
• Lawyer's pro __ work
• '60s singer Sonny
• U2 activist
• 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
• Pro . . . . publico - for the common good
• Cher's married name; U2's singer