Public Enemy, Robbie Williams also slated to play at February 22 event.
Vanessa Williams was among mourners at New York memorial service.
J. Lo-produced show picked up; 'Saved!' actress on 'Entourage'; Murder Inc. mogul separated from kingpin.
Pop sensations and Jon Bon Jovi sign on for annual benefit for children of war-torn country.
Vanessa Carlton, Flaming Lips, Robbie Williams, more perform.