He's settled down with a kid now, but once upon a time, Jack was a wild child. "I could remember being 13 and at a bar and people were like, 'What's this 13-year-old doing here?' and I would proceed to drink them under the table," he told MTV. "I thought that if I really wanted to fit in I had to show them that I was in a way just as adult as they were, 'cause I could hold my own just as well as they could, if not better." Then, in 2002, the 15-year-old spiraled out of control when his mother, Sharon, was diagnosed with colon cancer. "I had smoked pot and drank every day for two years," he told MTV. "I was taking Vicodin by the handful. Valium, Xanax, Dilaudid, Lorcet, Lortab, Percocet, you name it." By 17, he was in rehab.