A list of big-name artists, including Selena Gomez, Yoko Ono and Lady Gaga, have joined Billboard magazine’s campaign to encourage Congress to pass stricter gun laws. This week’s edition of Billboard included an open letter signed by over 180 musicians and music executives. Some the stars who signed the letter include: Jennifer Lopez, Katy Perry, Lin-Manuel Miranda, Zayn Malik, Paul McCartney, Sting, Barbra Streisand, Britney Spears, Ellen DeGeneres, James Corden and Tony Bennett. “The one thing that connects the recent tragedies in Orlando is that it is far too easy for dangerous people to get their hands on guns,” the letter reads. “We call on Congress to do more to prevent the gun violence that kills more than 90 Americans every day and injures hundreds more.” The petition comes after the largest mass shooting in the history of the U.S. at Pulse nightclub in Orlando and after the Senate failed to pass stricter gun measures Monday.