The American Idol star already has career plans for 5-month-old Aiden (with wife Caroline, 25). "I've told him, 'Go be a doctor. Don't be an attorney, don't be a musician,' " says Bice. One thing's for sure, though: Whatever path the little guy chooses, the singer will be on his side. "Bo's the best dad. He loves him with all of his heart," says Caroline.