She says that it was at this time when she got to known who her true friends were.
The singer also added that most of the people in her life were only with her till the time she could perform and have "used" and "lied" to her, reports contactmusic.com.
"My heart breaks from the people I have trusted and loved who I've worked so closely with, who have used me, lied to me, worked me into the ground for the personal gain," Gaga posted to her fans on the website littlemonsters.com.
"When I woke up in the hospital after my surgery there were many people that were not there. My health did not matter. I did not matter unless I could perform. This is a very hard lesson," she added.
The 27-year-old singer suffered a hip injury that forced her to end her "Born This Way Ball" world tour last year.
--IANS (Posted on 07-01-2014)