By Jonathan Borge
Updated: Aug 04, 2016 @ 11:50 am
Jamie McCarthy/Getty

Who wore it best?

While Lady Gaga has been a longtime muse of designer Brandon Maxwell, the 30-year-old star struck a diplomatic chord on Tuesday in a black strapless velvet Maxwell design that felt reminiscent of the all-white custom frock the relative fashion newcomer created for First Lady Michelle Obama’s White House State Dinner on Tuesday.

Gaga’s party-ready version naturally was more risqué, but there’s no denying that each of the leaders in their respective fields gleamed thanks to Maxwell’s talent. So what exactly was the Grammy winner all dressed up for? She slipped into the sexy high-slit piece for Tony Bennett’s 90th birthday party at the Rainbow Room inside the Empire State Building just hours after exiting her apartment in yet another sleek black design.

Gaga rocked a classic, Old Hollywood-inspired bold lip and an equally bold smoky eye and later performed with legend Stevie Wonder while hanging out with Paul McCartney at the event. She took to Instagram to share her enthusiasm for Bennett’s milestone birthday. “I am so honored to be by Tony’s side on his 90th birthday. Today we lit up the Empire State Building together, in the colors of the Italian flag to commemorate Bennett’s legacy as the greatest living legend and example of the Italian American dream,” she wrote. “We love you ‘Ton’ happy birthday! 90 is the new 20!”

I am so honored to be by Tony's side on his 90th birthday. Today we lit up the Empire State Building together, in the colors of the Italian Flag to commemorate Bennett's legacy as the greatest living legend & example of the Italian American Dream. We love you "Ton'" Happy Birthday! 90 is the new 20!

A photo posted by Lady Gaga (@ladygaga) on

What a beautiful night with beautiful friends. We love you Tony you're the apple of our eyes. You're the best there is! #happy90thtonybennett 🎂🍾

A photo posted by Lady Gaga (@ladygaga) on

Thank you to a man who really changed not only my life but the life of my family and friends forever. We are so lucky just to be around you. See you at 95. And 100. And 199.

A photo posted by Lady Gaga (@ladygaga) on

When we flipped the switch to light up the Empire State Building for Tony's bday! 🌟🌟🌟🌟🌟

A photo posted by Lady Gaga (@ladygaga) on

When we flipped the switch to light up the Empire State Building for Tony's bday! 🌟🌟🌟🌟🌟

A photo posted by Lady Gaga (@ladygaga) on

I love singing with Stevie, even if its impromptu! He is the kindest most generous soul. I said what key we doin' it in man F, F#? He goes. "I'll find you, girl."

A photo posted by Lady Gaga (@ladygaga) on

A photo posted by Lady Gaga (@ladygaga) on

A photo posted by Lady Gaga (@ladygaga) on

Thank you @brandonmaxwell for this beautiful dress. I got that "First Lady" style! (When your best friend designed a dress for FLOTUS and u bring it up to him 50 times a day cuz ure so proud 🤗)

A photo posted by Lady Gaga (@ladygaga) on

The jazz legend also hinted at a follow-up to the duo’s beloved Cheek to Cheek. “She and I are talking about doing a second album,” Bennett reportedly said.

Only time will tell.

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