Nine Inch Nails and Jane's Addiction have been added to the bill of this year's Oxegen festival, which takes place at the Punchestown Racecourse near Dublin from July 10 to 12.Also on the bill are Manic Street Preachers, Pendulum, The Mars Volta and the Yeah Yeah Yeahs.Internet speculation suggests that NIN and Jane's Addiction might soon confirm appearances at Scotland's T In The Park festival. Historically the two festivals have shared bills, in much the same way as the Reading and Leeds festivals, because they tend to take place on the same weekend.