Britney also worked with veteran hard rock producer Mutt Lange (Def Leppard, AC/DC) on the new album.

To support the new album, Britney and her belly button have extended her current tour to run though the summer concluding in Nashville on Sept. 5th. 

The Tour Dates

6-15, Charlotte, N.C., Blockbuster Pavilion 
6-16, Raleigh, N.C., Alltel Pavilion 
6-17, Virginia Beach, Va., Virginia Beach Amphitheater
6-18, Manassas, Va., Nissan Pavilion 
6-20, Baltimore, Md., Merriweather Pavilion 
6-21, Hartford, Conn., Meadows Music 
6-24, Hershey, Pa., Hershey Park Stadium 
6-27-28, Wantagh, N.Y., Jones Beach 
7-2-3, Holmdel, N.J., PNC Arts Center 
7-5, Camden, N.J., E Center 
7-7, Chicago, New World Music Theater 
7-8, Milwaukee, Marcus Amphitheater 
7-9, Detroit, Pine Knob 
7-16, St. Louis, Riverport Amphitheater 
7-17, Kansas City, Kan., Sandstone Amphitheater 
7-19, Dallas, Starplex Amphitheater 
7-20, San Antonio, Texas, Alamodome 
7-21, Houston, Cynthia Woods 
7-26, Denver, Red Rocks Amphitheater 
7-27, Albuquerque, N.M., Mesa Del Sol 
7-28, Phoenix, Blockbuster Desert Sky 
7-29, Irvine, Calif., Irvine Meadows 
7-31, Los Angeles, Hollywood Bowl 
8-1, Concord, Calif., Concord Amphitheater 
8-3, San Diego, San Diego Sports Arena 
8-4, Las Vegas, MGM Grand 
8-6, Sacramento, Calif., Sacramento Valley Amphitheater 
8-8, Mountain View, Calif., Shoreline Amphitheater 
8-10, Portland, Ore., Rose Garden Arena 
8-11, Seattle, The Gorge 
8-14, Salt Lake City, Delta Center 
8-21, Pittsburgh, Star Lake Amphitheater 
8-28, Boston, Tweeter Center 
8-30, Saratoga, N.Y., SPAC 
8-31, Cleveland, Gund Arena 
9-1, Cincinnati, Riverbed Amphitheater 
9-2, Indianapolis, Deer Creek Amphitheater 
9-3, Columbus, Ohio, Polaris Amphitheater 
9-5, Nashville, Tenn., First American Music Center