This summer, music fans will be able to hear two pop-rock singer-songwriters for the price of one, as Gavin DeGraw and Colbie Caillat have announced a lengthy co-headlining tour.

The 22-date trek kicks off on May 25 in Simpsonville, S.C., and wraps on June 29 at the Ravinia Festival in Highland Park, Ill. General tickets for the tour, which will feature Andy Grammar as the opener, go on sale next Friday, Mar. 30. 

Both artists have 2011 albums to support on the road: DeGraw's Sweeter has sold 129,000 copies since its September release according to Nielsen SoundScan, while Caillat's All Of You has moved 256,000 units since hitting stores last May. DeGraw recently scored his first No. 1 song on the Adult Pop Songs chart with "Not Over You," and Caillat grabbed her seventh top 10 on the same tally last October with "Brighter Than The Sun," which peaked at No. 2.

The joint tour will follow DeGraw's inaugural stint on ABC's Dancing With the Stars, which kicked off on Monday.

Here are the dates for Gavin DeGraw and Colbie Caillat's tour:

May 25: Simpsonville, SC (Charter Amphitheatre at Heritage Park)
May 26: Biloxi, MS (Hard Rock Hotel)
May 27: St. Augustine, FL (St. Augustine Amphitheatre)
May 29: Pittsburgh, PA  (State AE - Outdoors)
June 1: Philadelphia, PA (Penns' Landing - River Stage)
June 2: New York, NY (Rumsey Playfield)
June 5: Bethlehem, PA (Sands Bethlehem Event Center)
June 7: Pomona, NY (Provident Bank Park)
June 8: Norfolk, VA (Town Point Park)
June 9: Vienna, VA (The Filene Center at Wolf Trap)
June 10: Baltimore, MD (Pier Six Pavilion)
June 12: Raleigh, NC (Raleigh Amphitheatre)
June 13: Atlanta, GA (Chastain Park Amphitheater)
June 14: Charlotte, NC (Time Warner Cable Uptown Amphitheater)
June 17: Fayetteville, AR (Arkansas Music Pavilion)
June 19: Bee Cave, TX (The Backyard)
June 21: Lake Charles, LA (L'Auberge Du Lac Casino Resort - Pool Stage)
June 22: Thackerville, OK (WinStar Casino)
June 24:  St. Louis, MO (Peabody Opera House)
June 26: Sioux City, IA (Orpheum Theatre)
June 27: Apple Valley, MN (Weesner Amphitheater)
June 29: Highland Park, IL (Ravinia Festival)