Veteran model Christie Brinkley is selling her Hamptons, New York mansion for $30 million (GBP15 million). Billy Joel's ex-wife, who split from her fourth husband Peter Cook last year (06), has placed the Tower Hill estate in Bridgehampton up for sale for $4 million (GBP2 million) more than it had been listed for when she first tried to sell it before her marriage split. The lavish abode includes five bedrooms, a five storey observation tower, tennis court, gym and a 75 foot (22.8 metre) swimming pool, according to the New York Post.