The legendary rock band reunited onstage for the first time in more than 22 years, just hours after they announced the Not In This Lifetime Tour.
Lead vocalist Axl Rose and lead guitarist Slash performed alongside bassist Duff McKagan, as a crowd of more than 250 watched them perform such classics as "Welcome to the Jungle", "Sweet Child O' Mine", "Paradise City" and more.
Cooper, 41, and his mother stood alongside A-listers Emily Ratajkowski, Lenny Kravitz, Chris Brown, Jim Carrey, Nicolas Cage and Michelle Rodriguez in the VIP balcony overlooking the stage.
Guns N' Roses' reunion tour will officially kick off in Las Vegas on April 8. The rockers will also headline the Coachella Valley Music and Arts Festival later this month.