If there was ever any doubt about whether U2, those middle-aged rockers from Ireland, can still hang with the young kids in the alternative world, the unprecedented addition of a second show at Slane Castle (Ireland) goes a long way to quiet those non-believers. When the first show at Slane went on sale, every one of the 80,000 tickets sold out in mere minutes, prompting speculation that the band just might be able to pull off what no other act would even attempt, selling it out twice in a row. The second show will take place on September 1, although a formal announcement has yet to be made. Opening acts for the first date are the Red Hot Chili Peppers, Coldplay. Kelis, and JJ72.