The Applause hitmaker spent thousands of dollars on more than 50 pieces of the King of Pop's wardrobe, including one of Jackson's gloves, items from the Billie Jean video and the famous red jacket from Thriller.
During an interview with U.S. chat show host Ellen DeGeneres on Monday (25Nov13), Gaga opened up about her iconic collection, insisting she is keeping the wardrobe in perfect condition to honour her idol's legacy.
She explained, "I heard that they were auction off his tour clothes and they are my most prized possessions... (For me), the clothes that are my favourite are the ones I wear on stage with my fans. I imagine that he felt the same way.
"So I really wanted to preserve that for him. It really made me kind of crazy - the thought of a bunch of rich people each buying one piece and they get scattered to the winds. I thought well if I just buy them all, then I can put them somewhere nice."
While most of the sacred items are kept locked away, Gaga admits she can't help but don some of the apparel the music icon once wore.
She adds, "I would never wear the Thriller jacket. But there's this one letterman sweater that just says 'Mj' on it and a jacket that says 'Stop the filthy tabloid press' on the back. I don't go out in them, but when I'm in the studio or if I'm feeling down, I wear them because I feel like he would've been okay with that.
"I am taking care of his clothes. And for any Mj fan that's watching, that s**t is pristine and it's perfect."