Photo by Heather Kaplan Five months since the release of his incredible Good Kid: M.A.A.D City, rapper Kendrick Lamar continues to hold sway in its popularity. Lamar recently performed “Poetic Justice,” and “Girl Don’t Kill My Vibe” on Jimmy Kimmel Live. Watch the videos below. Lamar is playing the Firefly Music Festival on a lineup that includes Tom Petty, Red Hot Chili Peppers, Vampire Weekend, Foster The People, Grizzly Bear, MGMT and many others.