Mother Monster Lady Gaga takes the stage tonight at First Niagara Center, the latest stop on the megastar’s summer tour, the ARTPOP Ball. As the tour name suggests, the show promises to be more than just a concert. If it’s anything like what we’ve come to expect from Gaga, it will elevate the pop music genre into an artistic, theatrical experience, something no audience member will ever forget. Doors open at 7:30. Tickets start at $37.50 and are available through tickets.com and the First Niagara Center Box Office.