The singer attended Enigma, Lady Gaga's Las Vegas residency show at Park MGM's Park Theater, and couldn't hold back her excitement.
Lady Gaga even dedicated a song to the musical icon!
Katy Perry, Orlando Bloom and Adam Lambert were just a few of the celebs in attendance.
Peek our list of A-list ladies who completely took this year by storm with their thrilling sartorial choices.
Take a look back on this year's show-stopping fashion moments from Rihanna's Met Gala ensemble to Lady Gaga's feathered gown.
ET's Style Editor, Marisa Runyon, runs down the stars who made fashion history this year.
ET ranks the greatest music collaborations of the year, including Cardi B and Bruno Mars, and Lady Gaga and Bradley Cooper.
But, don't expect the actress to tie the knot with Christian Carino soon. A source tells ET she's just too busy to plan one!
A source tells ET that the singer is 'so over the moon' right now.
ET breaks down all the categories that are heavily stacked by women, following last year's male-dominated winners list.
The song 'Shallow,' performed by Gaga and Cooper in 'A Star is Born,' earned a Golden Globe nomination for Best Original Song.
Gaga received two nominations, Best Actress and Best Original Song, for her work with Bradley Cooper in 'A Star is Born.'
The 2019 Golden Globe nominees were announced on Thursday morning, with multiple noms for Lady Gaga and Bradley Cooper as well.
