Justin Bieber just wowed the crowd at Kendrick Lamar and SZA’s "Grand National Tour" ... making a surprise appearance at the Friday night concert in Los Angeles' SoFi Stadium -- and getting a bit handsy with SZA.
Watch SZA Bring Out Justin Bieber In LA
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So far, guests for Kendrick Lamar and SZA’s Grand National Tour have been Playboi Carti, Baby Keem, Kaytranada, and Lizzo. They..