Lesbian comic and television host Ellen DeGeneres is just one of several celebrities demanding an end to gun violence in the aftermath of the Sandy Hook shooting.
Among the other artists making an appearance in the video also include Beyoncé, Julianne Moore, Gwyneth Paltrow, Jeremy Renner, Chris Rock and Will Ferrell.
The black-and-white video begins with the celebrities talking about the Columbine shootings in 1999, Virginia Tech in 2007 and Aurora, Colorado this year.