Keith Urban has revealed the 58 cities for his summer tour, but no specific dates have been announced. A full list of U.S. and Canadian cities is available on his Web site. The tour will launch in May. Urban will release a new album, which has not yet been titled, on March 31. Supporting acts on the tour -- with one per show -- include Jason Aldean, Dierks Bentley, Glen Campbell, Lady Antebellum, Sugarland, Taylor Swift and the Zac Brown Band.