With hits like “Iris,” “Black Balloon” and “Slide” in its music catalogue, Goo Goo Dolls have recorded some of the most memorable pop songs of the last 30 years, with “Iris” still a mainstay at weddings around the country.“How many musicians would give everything they have just to have one millionth of what that song did for us? It was truly a gift,” said singer John Rzeznik, who, along with bassist Robby Takac, formed the band back in 1986 in Buffalo, N.Y. “When we first started, we were looking to make enough money for a case of beer and to meet some girls. We just wanted to get a headlining