Justin Bieber is prepping fans for his headlining Coachella set next week. On Tuesday, the pop star shared a montage clip on X from his secret pre-Coachella show at the Roxy Theater in Los Angeles this past weekend. Bieber performed his first U.S. concert in four years on Sunday night at an invite-only gig with a no-phones policy. The new clip provides fans who couldn’t be there a taste of what’s to come. In the clip, Bieber tells the Roxy Theater audience, “I just want to say thank you so much