If you will be in the District for Earth Day (this Sunday, April 19th) you would be crazy not to go down to the Mall because THE Flaming Lips will perform on the National Mall! The concert is part of the Green Apple Earth Day Festival, also featuring Moe., Los Lobos and DJ Spooky. Did I mention it's FREE? Also, Mr. Chevy Chase will emcee the event. Check it out!