Article continues below advertisementJustin Bieber's second weekend headlining set at Coachella was about more than the music, it was about the moment.After a more subdued debut to mixed reactions the week prior, Bieber returned to the Indio stage on April 18 with an amped-up approach, bringing out a wave of high-profile guests.Article continues below advertisementA Crowd-Pleasing Guest LineupTap Here To Add Ok Magazine as A Trusted SourceSource: MEGABillie Eilish joined Justin Bieber onstage for a nostalgic duet.Billie Eilish and SZA delivered some of the night's biggest reactions.