Angelenos were treated to a rare performance from Justin Bieber, as he took the stage at SZA and Kendrick Lamar's Grand National Tour yesterday.

Kendrick Lamar and SZA have been sharing the spotlight with each other on their current Grand National Tour, and the “All the Stars” collaborators are bringing their A-list friends into the fold during select shows.

SZA had a surprise in store for fans at SoFi Stadium on Friday night (May 23): special guest Justin Bieber. The second L.A. stop of Kendrick Lamar's Grand National Tour, Bieber joined the five-time Grammy Award nominee on-stage to perform their rendition of "Snooze.