28-year-old eccentric singer, Lady Gaga, left little to the imagination by going completely topless during a dance rehearsal in Austria on Sunday afternoon. The singer who is in Vienna as part of her artRave: The ARTPOP Ball world tour, was pictured showing off her shapely derriere dressed in a neon coloured G-string and fishnet stockings. Keeping some modesty with white nipple guards, the pop sensation oozed heaps of sex appeal as she put in the final few touches ahead of her X-rated performance. More pictures after the break
