There have been rumors about JOHN TRAVOLTA'S sexuality for a while now, but they really ramped up this year.  Well, KIRSTIE ALLEY would like you to know they're CRAP.  In an interview with BARBARA WALTERS that'll air on "20/20" Friday night, Kirstie says, "I know John. With all my heart and soul, he's not gay.  I think it's some weird way, in Hollywood, if someone gets big enough and famous enough, and they're not out doing drugs and they're not womanizing, what do you say about them?  I think people think that's the supreme insult, 'He’s gay.'"

In fact, Kirstie calls John, "The greatest love of my life."  She says they fell in love while making the 1989 movie "Look Who's Talking", and,  "it took everything that I had, inside, outside, to not run off and marry John and be with John for the rest of my life.”  Kirstie was still married to PARKER STEVENSON at the time, but John was single.  He didn't marry KELLY PRESTON until 1991.  (Portions of the interview aired yesterday on "Good Morning America".  Here's video.)

Kirstie is hyping her new book, "The Art of Men".  Earlier this week, she admitted that she and PATRICK SWAYZE fell in love while filming the miniseries "North and South".  In both cases, she claims the "affairs" never went beyond KISSING. 

(Kirstie also says Scientology helped her beat her cocaine addiction.  You can read more about that here.)