Whoa, guess we’ve been preoccupied and missed out.  Last Thursday the killing Kendrick Lamar appeared on The Tonight Show with Alicia Keys and Johnny Marr to perform their collaborative It’s On Again from the Amazing Spider-Man 2 soundtrack (which also features, interestingly, the phantastic Phosphorescent).   If you do nothing else, watch Lamar rule in the first 1:01 of the video below.  And Ms. Keys and Mr. Marr are all fine and good too.  After, check out the high-production-values (there’s a shocker) official video for the song.