The 'You and I' singer wrote in an open letter on her GaGa Daily website that she is "happy to have [her] spirit back" following her personal and professional difficulties.
"The past year was a challenge," she said. "Whether it be the record label disagreeing with me on single choices, or directors who could only create an idea of 'Gaga' or what I've 'done before' and not able to move forward.
"And there was also of course the incessant dragging of the most important single of my career in dead-beaten-horse-mud.
"Then there were all the personal moments. Betrayed by lifelong friends, mentors I've had for years suddenly taking advantage of me, and a massive struggle with my body image."
She continued: "I've grown and left most of these things behind, the monsters of fame are very real. But I wanted to thank you for bearing with me a little bit."
GaGa's letter was written to mark the release of her Fame perfume trailer and comes as she was threatened by PETA for apparently rejecting her anti-fur stance.
The 'Judas' star has confirmed that she will release her third studio album ARTPOP in 2013.
Watch the video for 'Judas' below: