In celebration of Tony Bennett’s 90th birthday, some of the biggest names in music got together for a tribute show that redefined what a career retrospective can look like with unmatched class, elegance and style.

Lady Gaga, who collaborated with Bennett on a 2014 duets album, Cheek to Cheek, kicked the evening off with a flawless cover of Frank Sinatra’s famous hit “The Lady is a Tramp.”

While singing, Gaga and Bennett shared a sweet moment as Gaga smiled at the iconic singer – who was seated in the audience, and returned the gesture by blowing her a kiss.

“You’re my family, Tony,” Gaga said, as she showed off her tattoo dedicated to Bennett, which she got back in 2014.

Additional performers who turned out to honor Bennett with musical performances included Billy Joel, Leslie Odom Jr., and even Kevin Spacey, who famously played crooner Bobby Darin in the 2004 biopic Beyond the Sea.

For more on the epic friendship between Gaga and Bennett, check out the video below.