This summer, Kiss and Aerosmith have extended their successful co-headlining tour into late December. The trek, which rolls into Phoenix tonight (Oct. , is now slated to wrap Dec. 20 in Fresno, Calif. Several major markets will be revisited, including Boston, Detroit, New York and Los Angeles.

Meanwhile, sources say each band is prepping separate arena tours for next year. As previously reported, Aerosmith will also release a collection of blues-inspired songs on Columbia in early 2004.

The Kiss/Aerosmith combination has been a potent one at the box office. According to figures for 24 shows submitted to Billboard Box Score, the tour has played to 85% capacity and grossed more than $31.5 million.

"There are a lot of people who see this as the tour of the year, and a lot of people want to see it," Kiss principal Paul Stanley told Billboard in August. "As long as everybody's enjoying themselves, that's the key to it -- we always wind up going full-circle to 'this has to be enjoyable.' Fans know when you're having a great time, so as long as this is fun, we'll continue to do it. If it truly turned into the battle of the bands, we'd go home."

Here are Kiss/Aerosmith's tour dates:

Oct. 8: Phoenix (Cricket Pavilion)
Oct. 10: Mountain View, Calif. (Shoreline Amphitheatre)
Oct. 12: Auburn, Wash. (White River Amphitheatre)
Oct. 14: Marysville, Calif. (Sleep Train Amphitheatre)
Oct. 16: Chula Vista, Calif. (Coors Amphitheatre)
Oct. 18: Devore, Calif. (Hyundai Pavilion)
Oct. 20: Albuquerque, N.M. (Journal Pavilion)
Oct. 22: Salt Lake City (Delta Center)
Oct. 24-25: Las Vegas (MGM Grand Garden Arena)
Nov. 6: Omaha, Neb. (Qwest Center Omaha)
Nov. 8: Grand Forks, N.D. (Alerus Center)
Nov. 10: Minneapolis (Target Center)
Nov. 12: Grand Rapids, Mich. (Van Andel Arena)
Nov. 14: Bridgeport, Conn. (Harbor Yard)
Nov. 16: New York (Madison Square Garden)
Nov. 20: Washington, D.C. (MCI Center)
Nov. 22: Greensboro, N.C. (Greensboro Coliseum)
Nov. 24: Manchester, N.H. (Verizon Wireless Arena)
Nov. 26: Boston (FleetCenter)
Nov. 28: Albany, N.Y. (Pepsi Arena)
Nov. 30: Auburn Hills, Mich. (Palace of Auburn Hills)
Dec. 3: Tampa, Fla. (St. Pete Times Forum)
Dec. 5: Jacksonville, Fla. (Veterans Memorial Arena)
Dec. 8: Louisville, Ky. (Freedom Hall)
Dec. 10: Knoxville, Tenn. (Thompson-Boling Arena)
Dec. 12: Moline, Ill. (Mark of the Quad Cities)
Dec. 14: Oklahoma City (Ford Center)
Dec. 18: Inglewood, Calif. (the Forum)
Dec. 20: Fresno, Calif. (Save Mart Center)