Last year???s event headlined by artists such as Radiohead and Jack Johnson drew over 70,000 people.Organized by the same company that mounts California???s Coachella Music and Arts Festival, this year???s line-up includes marquee names such as touchy-feely rockers Coldplay, metal heads Tool, and Brooklyn dance-punk stalwarts Yeah Yeah Yeahs.The Beastie Boys were originally scheduled to headline t