(Reuters) - British rockers Blur and The Stone Roses will be joining French indie-rock band Phoenix and Red Hot Chili Peppers to headline this year's three-day Coachella Valley Music and Arts Festival, organizers said on Thursday. The annual music festival, set for two consecutive weekends in April, has become one of the largest U.S. music festivals, attracting more than 80,000 people to the desert town of Indio, California. ...