Plans for Avril Lavigne [ tickets ]'s fall tour--dates for which have trickled in during recent weeks--have finally been hammered out in full.

The 24-city outing is scheduled to kick off in Dallas on Oct. 25, and wraps up a month later on the Canadian performer's home turf. Details are shown below.

The roadwork supports Lavigne's sophomore album, "Under My Skin," which she released in late May. Fueled by first single "Don't Tell Me" and current hit "My Happy Ending," the album has sold more than 2 million copies in the U.S. and 5 million copies worldwide, according to a press release.

The album's third single, "Nobody's Home," is scheduled for release later this fall.

Samples of all of the album's tracks are streaming at Lavigne's website.

"Under My Skin" is the follow up to Lavigne's 2002 debut, "Let Go," which hit No. 1 on The Billboard 200 album chart, and has sold more than 15 million copies worldwide, according to RCA Records.

Lavigne, who co-wrote the new album's 12 tracks, collaborated with producers Butch Walker (of the Marvelous 3), Raine Maida (of Our Lady Peace), Don Gilmore (Linkin Park, Pearl Jam), Ben Moody (formerly of Evanescence) and singer-songwriter Chantal Kreviazuk. Lavigne's recently departed guitarist, Evan Taubenfeld, co-wrote much of the material with her.

On Friday (9/17), Lavigne is scheduled to appear on the syndicated "Oprah Winfrey Show."

The singer will also perform on "Fashion Rocks," a taped special that airs Sept. 26 on Fox-TV. She'll play "Iris" with Goo Goo Dolls' Johnny Reznick on acoustic guitar, and will be joined by Taubenfeld for "Nobody's Home." A full orchestra will accompany on both songs, according to Lavigne's website.