Lady Gaga is the queen of constantly reinventing herself, but deep down, she insists she just wants to be authentic. “When I was younger, I was a lot more in tune with what people were writing about me. I was always keeping myself up-to-date with the sentiment around my music or my fashion,” the star, 38, told POPSUGAR in a new interview. “Nowadays, and especially since I’m in my early 30s, I’ve learned that the most important thing to own about yourself is your mind, and your heart, and your imagination. I’m reminded that my values and creativity are the most important, and that then steers y…