This is the People article
https://people.com/liza-minnelli-78th-birthday-reveals-secret-to-survival-exclusive-8607445
Excerpt:
βA party is being thrown in my honor by dear friends [pianist] Michael Feinstein and Terrence Flannery β she says. βThere will be food, fabulous music and I am told to expect a wonderful surprise and my only clue is Elsa Peretti!” (Minnelli has long worn the modern designs of the Italian jeweler, who, like her, was a friend of Halston.)