Shania Twain [ tickets ] fans in the western U.S. finally have some concert dates to look forward to.

The singer, whose headlining run resumes on Nov. 21, has added new December stops in Portland, OR; Sacramento, CA; San Jose, CA; Anaheim, CA; Phoenix; and Las Vegas.

Members of Twain's official fan club can participate in a ticket pre-sale that starts on Thursday (11/6); the general public will get a shot at tickets during general on-sales that begin on Saturday (11/8) and Sunday (11/9). Detailed ticket info is posted at Twain's fan-club website.

Twain's itinerary also includes a Nov. 20 performance at the Universal Amphitheatre in Universal City, CA, as part of VH1's "Big in 2003" concert, which also features OutKast, Pharrell (Neptunes, N.E.R.D.), Matchbox Twenty and Kid Rock.

On Nov. 18, Mercury Nashville issues "Shania Twain Up! Live in Chicago," a DVD that captures her July 27 performance at Chicago's Grant Park. The concert originally aired on NBC in August; the DVD features performances of six songs not included in the televised special. The complete track list is posted at Twain's website.

Twain continues to back her 2002 release, "Up!," which debuted at No. 1 on The Billboard 200 album chart last November and has sold more than 9 million copies worldwide to date, according to Mercury.

On Wednesday (11/5), Twain is scheduled to perform during the 37th Annual CMA Awards, which airs on CBS.

Last month, Twain received nominations in the American Music Awards' country-music categories for Favorite Female Artist and Favorite Album ("Up!), as well as in the Michael Jackson International Artist of the Year category. The ceremony will air on ABC on Nov. 16.