Uh-oh! Katy Perry’s born-again minister parents were in the house. How would pop’s new poster child for sexual experimentation deal with it? As usual, she went straight to the point. After her second song at the sold-out House of Blues, she announced: “I’m so nervous. My parents are in the audience tonight. God bless them. They made me.” She explained how her parents didn’t allow boys — or sugar — during her pre-teen years. Then Perry, still proudly naughty at age 24, confessed about her forbidden first crush: a boy at a Christian ice-skating night when she was 12.