The 27-year-old singer made the comment as she was being honoured at Glamour magazine's Women of the Year Awards in New York, reported People magazine.
"Who really belongs on the cover is not me. The picture, which I am very grateful for and very happy to be on this cover, I felt it was too beautiful," Gaga said.
"I felt my skin looked too perfect, and my hair looked too soft. This is not usually how I dress or how I carry myself," she added.
"I believe my true mission is to inspire young people to fight back against forces that make them feel like they're not beautiful or important. I do not look like this when I wake up in the morning," she said.