TULSA, Okla., April 8 The oldest member of the all-brother band Hanson welcomed his first son into the world as his wife successfully gave birth in Tulsa, Okla.People magazine reported that on Tuesday, Isaac Hanson and his wife Nicole welcomed their new son Clarke Everett into the world in the singer's hometown in Oklahoma.The child comes just months after Hanson wed the new 22-year-old mother last September.A statement from the 26-year-old singer said his new 8-pound, 12-ounce son would undoubtedly be a continued source of inspiration for him."His birth was an inspiration and I know that his presence in my life will continue to inspire me," he said. Along those lines, the "MMMBop" pop band is scheduled to begin a tour of Britain and Ireland on Friday to help promote its forthcoming fourth album. People said that album, entitled "The Walk," is due out from the three-brother band this summer. Copyright 2007 by UPI