Consider him the Madonna of hats. Kokin is New York's milliner-in-residence, a one-name wonder (no one ever calls him Steven) with a flock of loyal fans. Topping off everyone from Julia Roberts to Jennifer Lopez, Kokin has produced hit after hat hit for decades. Variety is key: Styles range from a demure cloche to an outsize sunhat garnished with jewels, and plenty of turbans, visors, and fedoras in between.