Lady Gaga performed at the ARQ nightclub in Sydney, Australia during her visit there. She performed "Born This Way", her #1 US hit and "Judas". Gaga wowed the crowd with her stunning vocals and her beyond amazing green hair. Watch the performance at ARQ in this link! http://youtu.be/OA9X4DFn_8c Previously, Gaga also tweeted that she would like to "Take a walk in the pARQ", which gave Aussie fans clues as to where to locate the Queen herself.