Ani DiFranco [ tickets ] has extended her in-progress North American run into the winter months as she continues supporting last year's "Red Letter Year."

The songstress, along with backing band Todd Sickafoose on upright bass and Allison Miller on drums, will take the stage tonight (11/20) in Philadelphia and again Saturday (11/21) in New York City. Since last check, 12 new concerts have been added to the itinerary, beginning with a Dec. 12 performance in Asheville, NC. The remaining dates fall in 2010, starting with a Jan. 21 gig in Stroudsburg, PA, and concluding with a March 10 show in Knoxville, TN. Details are below.

DiFranco's most recent studio album, "Red Letter Year," surfaced last September. The set marks the singer's 20th studio effort on her own Righteous Babe label and her first release since relocating to New Orleans and becoming a mom.

"When I listen to my new record, I hear a very relaxed me, which I think has been absent in a lot of my recorded canon," DiFranco said in a press statement. "Now I feel like I'm in a really good place."

DiFranco also recently unveiled a new live album in her Official Bootleg Series. The latest set--which is available at DiFranco's website--captures her 19-song Sept. 2006 performance at Saratoga, CA's Mountain Winery and includes the tracks "Red Letter Year," "Coming Up" and "Studying Stones."