Celebrity Billy, Christie Reunite By People Staff Published on February 5, 1999 12:00 AM Share Tweet Pin Email Billy Joel and Christie Brinkley reunited over the weekend, not as husband and wife but for an anti-nuclear protest in Waterford, Conn., where they both stood on the deck of a boat and held up signs that warned of the dangers of radiation. The divorced singer and supermodel joined others on Saturday for a protest cruise on Long Island Sound to demand the permanent shutdown of the Millstone nuclear power plants. Earlier this year two of the reactors were allowed back into operation after three years of safety concerns.