Two of country's biggest stars are joining forces for a U.S. tour early next year. Keith Urban and Carrie Underwood will hit the road together beginning Jan. 31 in a city to be announced. The outing w

Two of country's biggest stars are joining forces for a U.S. tour early next year. Keith Urban and Carrie Underwood will hit the road together beginning Jan. 31 in a city to be announced. The outing will play 24 dates to be announced; tickets go on sale Dec. 1.

First, Urban will cap a hard-touring 2007 with North American dates through mid-December. He will also on Nov. 20 release the compilation "Greatest Hits: 18 Kids," via Capitol Nashville.

Underwood will be touring in support of her second Arista Nashville album, "Carnival Ride," which recently debuted at No. 1 on The Billboard 200. The "American Idol" winner's only other shows at present are a Nov. 16 appearance alongside top country names at the Oklahoma Centennial Spectacular in Oklahoma City and a May 4 set at the Stagecoach festival in Indio, Calif.

Here are the cities for the Urban/Underwood tour:

Uncasville, Conn.
New York
Atlantic City, N.J.
Tallahassee, Fla.
Biloxi, Miss.
Kansas City, Mo.
Omaha, Neb.
San Jose, Calif.
Baltimore
State College, Pa.
Charlotte, N.C.
Gwinnett, Ga.
Rochester, N.Y.
Hershey, Pa.
Roanoke, Va.
Charleston, W.Va
Bossier City, La.
Wichita, Kan.
Denver
Anaheim, Calif.
Charlottesville, Va.
N. Charleston, S.C.
Raleigh, N.Y.
Lexington, Ky.