The live finale airs Nov. 24.

With a hem several inches too long, the comeback diva had to keep hoisting the frock up to avoid falling on her face as she belted out the lyrics to “Million Dollar Bill.” Whitney even had to deal with the garb’s back fastening coming apart.

Despite the wardrobe malfunction, Whitney championed through her performance, telling host Dermot O’Leary: “I sang myself out of my clothes…”

On Monday, Whitney — who is staging a career comeback with the release of her album in 7 years, I Look To You – told Oprah that the crooner wasn’t physically abusive but that “he slapped me once but he got hit on the head three times by me.”

Whitney, 46, says she “was horrified he spit on me, in my face” and that left her “very hurt, very angry.”

The star says she was attracted to Brown, who she married in a lavish ceremony in 1992, because he had control in their relationship.

“He was my drug,” Whitney tells Oprah. “I didn’t do anything without him.” “Something happens to a man when a woman has that much fame. … I tried to play down all the time. I used to say, ‘I’m Mrs. Brown, don’t call me Houston.’”

Whitney Houston goes one-on-one with the Queen of Talk i a two-part appearance premiering on The Oprah Winfrey Show this Monday, Sept. 14.

In this sneak peek video of Oprah Winfrey’s one-on-one interview with legendary singer Whitney Houston, the singer describes the day her mother, gospel legend Cissy Houston, staged an intervention to get the star into rehab — with the help of the local sheriff.

Oprah chats with Whitney on the 24th season premiere of The Oprah Winfrey Show Monday, Sept. 14 and Tuesday, Sept. 15.

I Look To You — Whitney’s first LP of original material in seven years — is on course to sell more than 200,000 in its first week of release.