Billboard has dedicated its new cover to lobbying Congress on gun control. Dozens of artists and industry execs have signed the letter to "Stop Gun Violence Now." Signees include Thom Yorke, Paul McCartney, Trent Reznor, Lady Gaga, Beck, Iggy Pop, Katy Perry, Britney Spears, Yoko Ono, Michael Stipe, Lin-Manuel Miranda, Stevie Nicks, Pearl Jam, Wilco, My Morning Jacket, Courtney Love, Diplo, Kesha, Ringo Starr, Questlove, Pusha T, Rivers Cuomo, Sia, Selena Gomez, Talib Kweli, Wayne Coyne, Zayn, Alicia Keys, Andy Samberg, and Andrew Bird.

They are asking Congress to address two matters to prevent gun violence: 1. "Require a background check for every gun sale," and 2. "Block suspected terrorists from buying guns." Read the full letter here.