The fiancée of “Opie & Anthony” co-host Gregg Hughes has filed a $10 million defamation lawsuit against the New York Post over an erroneous gossip item claiming she made a sex tape with one of the stars of MTV’s “Jackass.”

Lynsi Smigo’s New York State Supreme Court complaint alleges that the newspaper smeared her in an April 23 “Page Six” column claiming that Hughes, known as “Opie” on the popular radio show, was “said to be livid over an X-rated romp” starring Smigo, 25, and performer Bam Margera.

The item, citing a longtime column source named Chaunce Hayden, claimed that a disgruntled former “Opie & Anthony” employee “recently acquired rights to the video from Margera and it’s soon to be released on a pay-for-play Web site.”

Hughes, 45, was also said to be “taking legal action to prevent its distribution.” In addition to suing the Post, Smigo has named Hayden and “Page Six” editor Richard Johnson as defendants in her lawsuit. On May 5, after Hughes and Margera had vehemently denied the report, “Page Six” pointed the finger at Hayden when reporting that its sex tape story was “entirely incorrect.”

The column added, “The Post sincerely regrets the error.” In response, Hayden claimed that he made it clear to a “Page Six” reporter that he had never actually seen the purported tape.