Fellow pop-punkers Good Charlotte [ tickets ] and Sum 41 [ tickets ] have added several new cities to their fall co-headlining tour, an outing that gets underway Oct. 21 in Seattle and will run for about a month.

Among the newly confirmed stops are Vancouver, Pittsburgh, Buffalo and Chicago; the full itinerary is below.

Each act is backing a new album: Good Charlotte's "The Chronicles of Life & Death" hit stores last week, while Sum 41's "Chuck" is due on Tuesday (10/12).

Good Charlotte's "The Chronicles of Life & Death" is the follow-up to 2002's double-platinum "The Young and the Hopeless."

Meanwhile, "Chuck," Sum 41's follow-up to 2002's "Does This Look Infected?," is named for Chuck Pelletier, a United Nations representative who helped to evacuate the group from its May trip to the Democratic Republic of the Congo, where it was shooting a documentary with the nonprofit group War Child Canada about that country's longstanding civil war .

The band arrived during a time of cease-fire, but violence broke out while they were in the country. "[Pelletier] herded the band into the lobby, then ran with them through gunfire to an armored tank and eventually to safety," said a press release issued by Island Records.

Streaming-audio and streaming-video versions of "We're All to Blame," the first single from "Chuck," are posted at Sum 41's website.