SINGER Lady GaGa has blasted rumours that she's a hermaphrodite as "ridiculous". Quizzed on an Aussie radio show, she said: "It's too low brow for me to even discuss." The US pop star, real name Stefani Germanotta, was responding to internet speculation about a controversial concert video. She also said in a recent web blog: "I have both male and female genitalia, but I consider myself a female." But GaGa, 23, told Oz's Matt and Jo show: "I've made fun of it before but to talk about it is ridiculous."