Stepping out of her comfort zone, Wrentham’s Ayla Brown last night chose a current top 40 song for her third week of competition on Fox TV’s popular star search, "American Idol." The 17-year-old daughter of state Sen. Scott Brown, R-Wrentham, and WCVB-TV news reporter Gail Huff selected the latest release of singer Natasha Bedingfield, "Unwritten." In doing so, she admitted, following her performance, she was taking a risk. "It was a risk, but I think I needed to take the risk because I, first of all, never performed like this before," she said. "I’m only comfortable usually with ballads." Two...