It'd be a waste of everyone's valuable time to pretend the biggest item in Tacoma music news this week isn't the arrival of Katy Perry and her Prismatic World Tour. Like, not only is Perry, like, one of the biggest names in Top 40, she's also brought Tegan and Sara along for the ride. A living fireworks display, the artist formerly known as Katheryn Elizabeth Hudson has sold, thus far, like, 11 million albums around the world. The RIAA claims she's the top-selling MP3 artist of all time. She's a gay rights activist, UNICEF Goodwill Ambassador and, most vital of all, the voice of Smurfette. Oh, and for a mere $457, you could snag a "platinum ticket" that'd put you right in the middle of a horde of incredibly spoiled teenage girls. Live a little!

KATY PERRY, 7:30 p.m. Saturday, Tacoma Dome, 2727 E. D St., Tacoma, $20.50-$457.96 (!), Ticketmaster.com