Willie Nelson [ tickets ] has added new dates to his current concert outing, which finds the Red Headed Stranger supporting his second album of standards from the American Songbook, 31 years after his first.

The trek, which continues tomorrow night (10/20) in Clearwater, FL, is now slated to run well into December, picking up a pair of shows apiece in Galveston, TX (11/29-30), and Sahuarita, NM (12/2-3), as well as single dates in Los Angeles (12/8) and Austin, TX (12/15), among others. Details are included below.

"American Classic," Nelson's first solo effort on the Blue Note label, surfaced in August, peaking at No. 14 on Billboard's Top Country Albums chart. The 12-track set, which currently sits at No. 20 on the chart, includes Nelson's backing band--Mickey Raphael (harmonica), Joe Sample (piano), Christian McBride (bass) and Lewis Nash (drums)--and features guest vocalists Diana Krall ("If I Had You") and Norah Jones ("Baby It's Cold Outside").

Also featured on the set is Nelson's cover of Fats Waller's "Ain't Misbehavin'."

"I had heard the song by various guys around in dance bands that I grew up playing in, and jazz bands, so I knew the song before I knew about its origin," Nelson told the Los Angeles Times. "I really didn’t know who he was. That came later. So when I did the song, a lot people said, 'Hey, you did that old Fats Waller song!' Yeah, of course."

In 1978, Nelson released, "Stardust," his first album of standards. That record was ranked No. 257 on Rolling Stone's 2003 list of the 500 greatest albums of all time.

Earlier this summer, Nelson embarked on a 22-date "Baseball Tour" alongside John Mellencamp and Bob Dylan. In March, the iconic singer/songwriter unveiled "Naked Willie," a 17-track set of recordings from the late 1960s that were stripped down to their original studio versions.