A BARBARA WALTERS EXCLUSIVE: TRANSGENDER BEAUTY CONTESTANT JENNA TALACKOVA SPEAKS FOR THE FIRST TIME ABOUT THE CONTROVERSY SURROUNDING HER COMPETING IN THE 2012 MISS UNIVERSE CANADA PAGEANT

Plus: Wealthy Texas Wife Survives Three Murder-for-Hire Attempts on Her Life - Husband's Mistress Admits to Hiring Hitmen, But Says Husband is Mastermind Behind Plot; Chris Cuomo Reports

Transgender beauty contestant Jenna Talackova speaks exclusively to Barbara Walters in her first interview since making international headlines for being disqualified from 2012 Miss Universe Canada competition because she was not a "naturally born female". Just days after the disqualification of Talackova, who was born a male but had sexual reassignment surgery at age 19, the Trump Organization, which owns the Miss Universe pageants, said it would not attempt to keep Talackova out of the competition. Her attorney Gloria Allred will also join in the interview.

Walters' exclusive interview will air on "20/20" on FRIDAY, APRIL 6 (10:00-11:00 p.m., ET) on the ABC Television Network. On Monday, April 9, Talackova will appear live on "Good Morning America" (7:00-9:00 a.m., ET) and on "The View" (11:00 a.m., ET).

PLUS: The ultimate case of "stand by your man" - Yvonne Stern was the target of a murder-for-hire plot, surviving three attempts on her life in three months. Her husband Jeff's longtime mistress, Michelle Gaiser, admitted to hiring a revolving door of hitmen to kill Yvonne after Gaiser was caught on tape trying to hire yet a fourth hitman to finish the job. But she says it was actually Jeff who was the mastermind behind the murder plan to kill his wife. Was it the ultimate fatal attraction, or was Jeff really behind it all? In an exclusive interview, Yvonne - for the first time since the attempts on her life - tells ABC News Anchor Chris Cuomo why she has forgiven her husband and is standing by her man as he faces trial next week accused of trying to have her killed

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David Sloan is executive producer of "20/20".