As he's talking, SZA walks up behind him and dumps a bucket of Gatorade over Lamar in slow motion. The announcement comes days after SZA's film with Keke Palmer, "One of Them Days," came in at No ...

None other than Grammy-winning singer SZA. Lamar and Apple Music released a trailer Thursday of him walking on a football field before SZA walked up from behind and playfully splashed the rapper.