"We're doing all these old, old songs on this tour, and it's been fun," Goo Goo Dolls' Johnny Rzeznik told the crowd at the Fillmore Detroit at a recent stop on the group's trek celebrating the 20th anniversary of its multi-platinum Dizzy Up the Girl album. "But," he continued, "I've gotta be honest -- I really want to go home and write some fucking new songs."Rzeznik and bandmate Robby Takac are doing just that, in fact, with plans to release a follow-up to 2016's Boxes next year."We're working on it right now," Rzeznik tells Billboard. "We're both working on stuff; We probably have half of t