Throughout her career, Lady Gaga has collaborated with several legends like Beyoncé for "Telephone" and Tony Bennett for two successful albums.
However, newer fans didn't know that there have been more artists that the pop star teamed up with in the past whether it be a stage performance or an unreleased collaboration.
From Metallica to Christina Aguilera, check out the five musical acts Mother Monster has collaborated with over the past decade.
Metallica
According to NME, the world-renowned pop star and the iconic metal band took the stage of the 2017 Grammy Awards and shocked audiences with their burning performance.
The group teamed up with Gaga for their classic hit "Moth Into Flame" which featured a literal burning backdrop and fans jumping in the side.
Looking back at the show, James Hetfield recalled their rehearsals while admiring the Grammy Award-winning artist, saying, "she was there for two hours before we even got there, working on her moves and thinking stuff up. She is extremely creative and a fearless artist."
At the time, the musician proved that she was a musical powerhouse that could sing any genre if she wishes to.
Pet Shop Boys
During the 2009 BRIT Awards, English synth-pop duo Pet Shop Boys surprised attendees and viewers at home when Gaga came out of nowhere and joined them for the performance.
At the time, the Academy Award-winning singer, who wore an outfit inspired by an English teapot, was only one year into her career but she was able to join the legends on stage.
The two musical acts performed "What Have I Done To Deserve This" with the pop star taking on Dust Springfield's part. (via Idolator)
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The Rolling Stones
In 2012, the Rolling Stones embarked on their "50 and Counting" tour to celebrate their 50 years in the music industry.
On December 15 of that year, the group took the stage of the Prudential Center in Newark where they featured some of the biggest stars like John Mayer, Bruce Springsteen, the Black Keys, and more.
Lady Gaga was also present at the event and she delivered an impressive performance of "Gimme Shelter" while wearing tall platform shoes and a long platinum blonde wig. (via NJ Arts)
Christina Aguilera
During the beginning of Lady Gaga's career, she had been compared to Christina Aguilera a lot; from their fashion, hair, and makeup.
The "Genie in a Bottle" songstress also made remarks about the pop star in a previous interview with The Los Angeles Times saying she was "unaware" of the pop singer at first.
Although there wasn't really a feud between the two, the pair surprised fans when Lady Gaga featured Aguilera on her song "Do What U Want" and performed it on "The Voice."
After performing together, the "Reflection" singer revealed that it was her first time meeting Gaga, adding, "she's like the most down to earth, real person that I've ever met in this business and female to female, in this industry it's really hard to find that kind of a person."
Cher
Lady Gaga and Cher first publicly interacted with each other when the legend presented the "Video of the Year Award" at the MTV Video Music Awards 2010.
The "Bad Romance" singer, who wore her infamous meat dress, won the category and took the stage to accept the award. Even though the "Believe" songstress follows a plant-based diet, she didn't hesitate to hold the musician's "meat purse" as she delivered her speech.
The two then collaborated on a song titled "The Greatest Thing" in 2011 for Cher's album "Closer To The Truth" but it was never publicly released. However, a leaked version has been circulating online for years.
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