LOS ANGELES, CA - JUNE 25: Future (L) and Kendrick Lamar perform onstage at 2017 BET Awards at Microsoft Theater on June 25, 2017 in Los Angeles, California. (Photo by Paras Griffin/Getty Images for BET)

Future had a surprise up his sleeve during his performance of Mask Off, he brought out Kendrick Lamar,

Watch the video below: