Kendrick Lamar to Appear br on 'Power' Lamar will star alongside rapper br 50 cent in the fifth season of the critically-acclaimed show. Lamar will make his guest br appearance on a new episode called 'Happy Birthday.' Mark Canton, executive producer of 'Power' The show focuses on a New Yorker who lives a double life as a drug dealer and a night club owner. The fifth season of Starz's Power premiered on July 1. Lamar's episode is set to air on July 29.