Lady Gaga has told how she suffered from severe depression last year - saying "I felt like I was dying".
The Applause singer, 27, received mixed reviews for her latest album ARTPOP and split with her long-term manager, Troy Carter, after a long recovery from hip surgery.
She told Harper's Bazaar magazine: "I became very depressed at the end of 2013. I was exhausted fighting people off. I couldn't even feel my own heartbeat. I was angry, cynical, and had this deep sadness like an anchor dragging everywhere I go.
"I just didn't feel like fighting any more. I didn't feel like standing up for myself one more time - to one more person who lied to me."
Gaga added: "I really felt like I was dying - my light completely out."
The musician said she began to look for the positive in her life in January.
"I said to myself, 'Whatever is left in there, even just one light molecule, you will find it and make it multiply. You have to for you. You have to for your music. You have to for your fans and your family'."
She told the magazine: "Depression doesn't take away your talents - it just makes them harder to find. But I always find it. I learned that my sadness never destroyed what was great about me.
"You just have to go back to that greatness, find that one little light that's left. I'm lucky I found one little glimmer stored away."