(FILES)Actress Catherine Zeta Jones arrives on the red carpet for the 85th Annual Academy Awards in this February 24, 2013 file photo in Hollywood, California. Oscar-winner Zeta-Jones headed back into treatment for bipolar disorder, her spokeswoman said."Catherine has proactively checked into a health care facility," her spokeswoman Sarah Fuller said April 29, 2013 in an email to AFP. "Previously Catherine has said that she is committed to periodic care in order to manage her health in an optimum manner," Fuller added. Zeta-Jones started a 30-day treatment on Monday, according to entertainment website TMZ. AFP PHOTO/FREDERIC J. BROWNFREDERIC J. BROWN/AFP/Getty Images