Jennifer Aniston, Beyonce, Selena Gomez and more of the biggest names in Hollywood have come together for one powerful PSA.

New York City Mayor Michael Bloomberg’s gun control group, Mayors Against Illegal Guns, gathered up a who’s who in Hollywood to get Americans to listen up and demand a change when it comes to gun violence. Following the Sandy Hook Elementary shooting in Newtown, CT on December 14th, the celebs ask one question: how many more?

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The chillinh PSA made us shudder with the reminders of all the shooting massacres that have happened since Columbine in 1999. And this PSA is far from the first time stars have demanded a difference on this issue. On December 19th, more than 100 public figures, such as Lady Gaga, Goldie Hawn and Martha Stewart, took out a full-page ad in the New York Times voicing their opinions on gun control laws.

"The time has come for courage," the ad reads. "The Courage to make our schools and workplaces, our shopping malls and movie theaters -- all the places we share every day -- safe from gun violence. The courage to stand up to the NRA -- to put human life ahead of extreme ideology. The courage to ban weapons of mass murder that at anytime, anywhere, can turn America into a killing field."

What did you think of the powerful PSA? Will it help make a difference?