Following separate sets featuring their individual hits, the shows will culminate with a collaborative finale featuring classics from both bands.

Chicago are touring in support of 'Chicago In Chicago,' a new DVD that captures the hometown headliners playing for a sold-out crowd in Chicago's Charter One Pavilion, culminating in an encore with the Doobie Brothers, which includes "25 or 6 to 4" and "Does Anybody Really Know What Time It Is?"

Chicago Tour Dates:

July 11 - Tucson, AZ - Anselmo Valencia Amphitheatre*
July 13 - Stateline, CA - Harvey's Lake Tahoe*
July 14 - Concord, CA - Sleep Train Amphitheatre*
July 15 - Los Angeles, CA - Gibson Amphitheatre*
July 17 - Denver, CO - Red Rocks Amphitheatre*
July 19 - Quapaw, OK - Downstream Casino Resort
July 20 - Kansas City, MO - Starlight Theatre*
July 21 - Dallas, TX - Gexa Energy Pavilion*
July 22 - Houston, TX - Cynthia Woods Mitchell Pavilion*
July 24 - Atlanta, GA - Chastain Park*
July 25 - Boone, NC - Holmes Convocation Ctr., Appalachian State Univ.*
July 27 - Columbus, OH - Ohio State Fair*
July 28 - Chicago, IL - Charter One Pavilion*
July 29 - Cincinnati, OH - Riverbend Music Center*
August 1 - Detroit, MI - DTE Energy Music Theatre*
August 2 - Pittsburgh, PA - First Niagara Pavilion*
August 4 - Atlantic City, NJ - Borgata*
August 5 - Raleigh, NC - Time Warner Cable Music Pavilion at Walnut Creek*
August 7 - Sylvania, OH - Centennial Terrace
August 16 - Mansfield, MA - Comcast Center*
August 18 - Wantagh, NY - Nikon at Jones Beach Theatre*
August 19 - Holmdel, NJ - PNC Bank Arts Center*
August 21 - Saratoga Springs, NY - Saratoga Performing Arts Center*
August 23 - Virginia Beach, VA - Farm Bureau Live at Virginia Beach*
August 24 - Scranton, PA - Toyota Pavilion*
August 25 - Gilford, NH - Meadowbrook U.S. Cellular Pavilion*
August 26 - Hartford, CT - Comcast Theatre*
August 28 - Binghampton, NY - Anderson Ctr. For The Performing Arts (BU)
August 31 - Tuscaloosa, AL - Tuscaloosa Amphitheatre
September 2 - Orange Beach, AL - The Amphitheatre At The Wharf
September 7 - Las Vegas, NV - Las Vegas Hilton Theatre
September 8 - Las Vegas, NV - Las Vegas Hilton Theatre
September 11 - San Diego, CA - Humphrey's
September 12 - San Jose, CA - Center For The Performing Arts
September 14 - Portland, OR - Oregon Zoo Amphitheatre
September 15 - Woodinville, WA - Chateau Ste. Michelle
September 16 - Boise, ID - Morrison Center For The Performing Arts