BEING a workaholic is finally taking its toll on singer Lady GaGa. The singer has been forced to cancel a concert in India after she felt dizzy and passed out. GaGa has been told by her doctors that she has irregular heartbeats and has been ordered to rest. Paramedics came to take care of me, and told me my heart-rate was irregular - a result of exhaustion and dehydration, she wrote on her Twitter page. Cant apologise enough for how sorry I am. I could hear my fans cheering from my dressing room, I begged everyone to let me go onstage. My stage has complicated mechanical elements, everyone was concerned Id be in danger during the 2hr show, since I had passed out earlier. I am so devastated. I have performed with the flu, a cold, strep throat: I would never cancel a show just based on discomfort. I hope you can forgive me. I love my little monsters more than anything, you are everything to me. I will make up the performance on Jan 26. SS