Fiona Apple will begin her first tour in several years Nov. 22 in Portland, Ore.

Fiona Apple will begin her first tour in several years Nov. 22 in Portland, Ore. The dates come in support of her third album, "Extraordinary Machine," which is released today (Oct. 4) via Epic. The set already is the top-seller at Apple's iTunes Music Store, according to the label.

Apple admits she is apprehensive about going back on tour after such a long layoff. "I'm slightly terrified," she tells Billboard. "If I'm going to go out and do shows, at a certain point, I'll love it. The first two weeks, you're getting used to it. The thing that I'm terrified about [is that] I'm going to want to include songs from the other albums in the show. I haven't tried to play any of my old songs in years. I'm so afraid of not knowing them."

Apple's touring band has yet to be announced. In August, album co-producer Mike Elizondo told Billboard.com he had "offered to put a band together as well as be a part of that band myself on bass. I've already put out some feelers to local musicians in L.A. that would probably comprise the band I'm thinking of."

On Thursday, Apple will perform and sign autographs at Tower Records in West Hollywood, Calif.

Here are Fiona Apple's tour dates:

Nov. 22: Portland, Ore. (Roseland)
Nov. 23: Seattle (Moore Theatre)
Nov. 25: San Francisco (Warfield Theatre)
Nov. 26: Los Angeles (Wiltern Theatre)
Nov. 28: San Diego (House of Blues)
Nov. 30: Las Vegas (House of Blues)
Dec. 2: Denver (Paramount Theatre)
Dec. 4: Chicago (Riviera Theatre)
Dec. 5: Cleveland (House of Blues)
Dec. 7: Boston (Orpheum Theatre)
Dec. 8-9: Philadelphia (Tower Theatre)
Dec. 11: New York (Nokia Theatre)