Liza Minnelli bravely ignored the pain of a broken wrist to perform at New York City's famed Birdland jazz club to benefit The Actors Fund's Phyllis Newman Women's Health Initiative and Tower Cancer Research Foundation's Dr. Philomena McAndrew Fund.

Liza Minnelli Chaplin Gala
Liza Minnelli Broke Her Wrist In Three Places When Rehearsing For The Benefit.

The 67 year-old performer's rep told the Associated Press that Minnelli had broken her wrist in three places as she rehearsed for the show on Sunday night and that her doctor had advised the Academy Award winner not to perform. However, the cause was so close to Liza's heart that she felt she couldn't possibly back out when her half-sister Lorna Luft, who is battling breast cancer, had asked for a little help making the evening as special as possible.

Lorna Luft Liza Minnelli
Lorna & Liza Dazzled At The Sold Out Show.

"Nothing was going to stop me from coming here tonight," Minnelli said before taking the stage. "Lorna asked me to be here and I wouldn't let her down." The Cabaret star and her sibling, who are both Judy Garland's daughters, sang live together for the first time in 20 years since they duetted at the Tony Awards in 1993.

Soon after the performance, Minnelli reportedly returned to the hospital for her wrist to be treated but not until she'd made her mark on the benefit. They sang the medley they made famous at the Tony Awards and received a standing ovation from a sold-out crowd.

Liza Minnelli
Liza Grimaced Through Pain To Help Her Cancer-Stricken Sister.

"This event means the world to me," Luft said tonight. "I'm so grateful to be feeling so well and performing again." The 60 year-old told in August of her approach towards her condition: "Your attitude has so much to do with your recovery, because it's really easy to curl up in a ball, and stay in bed," Luft said, via Fox News.

"The hard part is saying I'm not going to do this and I'm going to fight this, I'm going to make fun of it, and I'm going to laugh, I'm going to have a sense of humor. So when you are sick, and you really need that. It's amazing how your attitude really will lead to your recovery."