He made a surprise appearance with Kendrick Lamar during Earth, Wind & Fire's performance This image appears in the gallery:34 Pictures You Might Have Missed This Week (15th June 2015) 30. He made a surprise appearance with Kendrick Lamar during Earth, Wind & Fire's performance Picture: Getty 33 images See the full gallery: 34 Pictures You Might Have Missed This Week (15th June 2015)