As you could probably glean from Lady Gaga's most recent red carpet appearances, she didn't dye her hair in real life; rather, the wide range of styles and deep brunette colour came in the form of many wigs — the byproduct of Aspiras's creativity.
"I spent six months doing the forensics of hairstyles for 10 wigs," he said. "Then, before filming, when we were doing all the screen tests and whatnot, I came prepared with all 10 hero wigs — a new hairstyle for every major scene — and Ridley [Scott] said, 'Oh, you know what? We only need two wigs.' We move too fast, it's hard to pace them."
In the end, Scott changed his mind (although Aspiras did have to convince him before every scene and check in on how each style translated on screen) and as such, Lady Gaga wore all 10 wigs throughout the movie — and it ended up being the finishing touch that helped get her into character, and "the most gratifying thing as a hairdresser" to see.
"Do you know how nail-biting that was? In the early '80s when she had that big perm moment, when she says, 'Father, son, and the House of Gucci,' that almost didn't happen. But I am truly honoured that [Scott] respected and he trusted me to live out my hairstyling fantasies."