Singer gives stunning "I Left My Heart in San Francisco" performance, talks celebrating his 90th birthday
Aretha Franklin, Billy Joel will also perform with crooner during all-star 90th birthday celebration
Alicia Keys, Adam Levine, Garth Brooks, Carrie Underwood also set for CBS' centennial celebration 'Sinatra 100'
September release of 'The Silver Lining: The Songs of Jerome Kern' will celebrate titular composer
Backstage, Lady Gaga shared the best advice that she got from her duet partner
The pair sang the title track of their collaborative album, 'Cheek to Cheek,' in the round
Tony Bennett, John Mellencamp, Boyz II Men and more pay tribute to Joel at his Library of Congress' Gershwin Prize tribute concert
Gaga also gave a solo performance of "Ev'ry Time We Say Goodbye"
The singers will get cheek to cheek at The Cosmopolitan of Las Vegas on December 31st
"This composer was part of a subculture of nomadic hippies!," Gaga writes. "We channelled our own Gypsy lives in this performance"
"I Can't Give You Anything but Love" captures the unlikely pair as they record their collaborative album of standards, 'Cheek to Cheek'
"I Can't Give You Anything But Love" will appear on the vocalists' duets album next month
The singers spoke with Rolling Stone on the red carpet before Lincoln Center performance
Joel sat down with Stern on Monday to discuss life, love... and heroin?