A few country artists are among nearly 200 musicians and music executives who have signed an open letter to Congress asking for more to be done to prevent gun violence. The names are on the cover of the most recent issue of Billboard Magazine.

Cam, the Dixie Chicks and Rosanne Cash are three recognizable names who have signed. Big Machine Label Group President Scott Borchetta, Warner Nashville CEO John Esposito and Sony Music head Doug Morris also put their names down for change, in addition to pop and rock stars like Lady Gaga, Sting, Pearl Jam and Demi Lovato.

It’s a mix of entertainers, with Ellen DeGeneres and actor Andy Samberg also on the list. Together they make up a group advocating for common-sense gun safety. Specifically, they want a background check for every gun sale and to block suspected terrorists from buying guns.

The letter to Congress ends with:

Billboard and the undersigned implore you—the people who are elected to represent us—to close the deadly loopholes that put the lives of so many music fans, and all of us, at risk.

The idea for Billboard’s open letter was born after the two tragedies in Orlando, Fla. Both the shooting at the Pulse night club and killing of The Voice singer Christina Grimmie happened at places where fans and musicians gather, the magazine points out. Within a few days, they had nearly 200 names. All are listed with their signatures on a digital version of the letter. The letter is also the cover of the next issue of Billboard.

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