EXCLUSIVE: Debbie Reynolds Charms the Crowd in One of Her Final Shows - Watch the 'Bright Lights' Sneak Peek!

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When Debbie Reynolds took the stage, she was easily one of the best.

The beloved Hollywood legend -- who died at age 84 after suffering a stroke on Dec. 28, one day after her daughter, Carrie Fisher, died from cardiac arrest -- had an unbelievable stage presence that can be seen in a new clip from HBO's upcoming documentary, Bright Lights: Starring Debbie Reynolds and Carrie Fisher.

MORE: Debbie Reynolds Laid to Rest One Day After Carrie Fisher's Private Memorial Service

The preview footage is from one of Reynolds' final shows, at the South Point Hotel & Casino in Las Vegas, where she delights the audience, before confessing that she'll be stepping back from performing.

"This is it. You know, you folks came at the right time this is my last weekend ever to be in show business," Reynolds tells the crowd in a truly special, genuine moment. "I've gotta retire! C'mon, say wish me luck!"

WATCH: Celebrating Debbie Reynolds: A Look Back at the Film Legend's Most Iconic Roles

Meanwhile, Reynolds was laid to rest friday at Forest Lawn Memorial Park in Los Angeles, along with some of Fisher's ashes.

"The mood is very somber, friends and family are walking with their heads down and holding hands," an eyewitness at the funeral told ET.

WATCH: Celebrities React to Debbie Reynolds' Death

Watch the video below for more.

Bright Lights: Starring Debbie Reynolds and Carrie Fisher will debut on Jan. 7 on HBO.