NEW YORK, NY - SEPTEMBER 15: NEW YORK, NY - SEPTEMBER k.d. lang attends 'Tony Bennett Celebrates 90: The Best Is Yet To Come' at Radio City Music Hall on September 15, 2016 in New York City. (Photo by Matthew Eisman/Getty Images)

NEW YORK, NY - SEPTEMBER 15: NEW YORK, NY - SEPTEMBER k.d. lang attends 'Tony Bennett Celebrates 90: The Best Is Yet To Come' at Radio City Music Hall on September 15, 2016 in New York City. (Photo by Matthew Eisman/Getty Images)

NEW YORK, NY - SEPTEMBER 15: Michael Buble (L) and Luisana Lopilato attend Tony Bennett Celebrates 90: The Best Is Yet To Come at Radio City Music Hall on September 15, 2016 in New York City. (Photo by Matthew Eisman/Getty Images)

NEW YORK, NY - SEPTEMBER 15: Diana Krall attends 'Tony Bennett Celebrates 90: The Best Is Yet To Come' at Radio City Music Hall on September 15, 2016 in New York City. (Photo by Matthew Eisman/Getty Images)

NEW YORK, NY - SEPTEMBER 15: Comedian Mario Cantone attends 'Tony Bennett Celebrates 90: The Best Is Yet To Come' at Radio City Music Hall on September 15, 2016 in New York City. (Photo by Matthew Eisman/Getty Images)

NEW YORK, NY - SEPTEMBER 15: Rufus Wainwright attends 'Tony Bennett Celebrates 90: The Best Is Yet To Come' at Radio City Music Hall on September 15, 2016 in New York City. (Photo by Matthew Eisman/Getty Images)

NEW YORK, NY - SEPTEMBER 15: Emma Heming (L) and Bruce Willis attend 'Tony Bennett Celebrates 90: The Best Is Yet To Come' at Radio City Music Hall on September 15, 2016 in New York City. (Photo by Matthew Eisman/Getty Images)

NEW YORK, NY - SEPTEMBER 15: Diana Krall attends 'Tony Bennett Celebrates 90: The Best Is Yet To Come' at Radio City Music Hall on September 15, 2016 in New York City. (Photo by Matthew Eisman/Getty Images)