Lady Gaga's "The Artpop Ball" European Dates TV Ad Released! Tickets for the US leg of Lagy Gaga's new headlining tour "Artrave: The Artpop Ball", in support of her latest #1, studio album "Artpop", went on sale last December. Little Monsters from other parts of the world had to still wait for their local tour dates to be announced. While the Latin American, Asian and Australian fans of Lady