<p><br /> Lady Gaga has revealed that she was going to perform with Michael Jackson on his This Is It tour.<br /> </p><p><br /> The King of Pop died just weeks before the tour was due to start at London's O2 Arena in July 2009, after suffering a cardiac arrest.<br /> </p><p><br /> Speaking with US talk show host Larry King, Gaga said: I was actually asked to open for Michael on his tour. We were going to open for him at the O2 and we were working on making it happen.<br /> </p><p><br /> The singer also went on to reveal that she has tested borderline positive for Lupus, a very serious condition where the immune system attacks the body.<br /> </p><p><br /> The disease runs in her family and killed her aunt.<br /> </p><p><br /> She told King: As of right now I don't have it, but I have to take good care of myself.<br /> </p><p><br /> Gaga is currently touring in the UK.<br /> </p>
