2013 is gonna be A LOT different than 2012 for one "Real Housewife of Orange County"... former star Lynne Curtin officially pulled the plug on her marriage of 22 years, TMZ has learned.
Lynn -- who appeared in seasons 4 & 5 of the Bravo series -- recently filed docs in OC Superior Court to divorce her husband Frank Curtin, citing "irreconcilable differences."