Chicagoans team up to empower survivors on new song.
Plus, words from Beyoncé and Big Sean.
Artists across genres have come together for good causes.
The rapper joins Jennifer Hudson, Pitbull and more.
Plus, pics of Kelis, Future, Chris Brown, Rihanna and more.
The parents of Trayvon Martin and Jordan Davis attend United Nations International Convention on the Elimination of All Forms of Racial Discrimination, plus more national news.