Yeah, Justin Bieber was at the Everett Events Center in July, but the greatest pop extravaganza to overtake the Pacific Northwest this year will be Lady Gaga's Monster Ball, coming to the Tacoma Dome on August 21. Once upon a time, GaGa would drop by Neighbours, the Showbox, and even Nathan Hale High School. No longer. Tickets to the Monster Ball sold out in minutes, as will happen for the biggest star in the world. That means if you were too slow on the draw and still want to witness a piece of pop history?the leotards! The hairpieces! The dance moves! "Telephone"!?you have but one option: Get thee to a scalper. ?Erin K. Thompson