John Rzeznik is enjoying “Better Days” with his new family of three!The Goo Goo Dolls frontman and his wife Melina welcomed daughter Liliana Carella Rzeznik in Los Angeles on Thursday, Dec. 22, a rep for Rzeznik confirms to PEOPLE exclusively. The baby girl came into the world at 20 inches long, weighing 7 lbs., 9 oz.“Mama and baby are gorgeous and healthy. What more could I ask for?” Rzeznik tells PEOPLE.In November, Rzeznik, 51, announced that he was expecting a baby in December during a Facebook Live chat with Sirius XM.“I’m ready. I’m ready for action,” he said of being ready for diaper du