As we mentioned a few weeks back the Yeah Yeah Yeah's will be headlining the first day of this years Monolith Festival held at Red Rocks on September 12th and 13th. The line up is pretty much perfect and today they just out did themselves. The Mars Volta were just announced to headline Sunday and words can't describe how happy this makes us. One of my favorite bands in the world performing at such an amazing venue. Wow. They also just added the Cool Kids, Wale and The Features today. Check out the full line up and get tickets below.