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Black Sabbath is adding more dates to its upcoming North American tour.  The full itinerary will now take the band across 20 cities in the U.S. and Canada, including the previously announced four dates in Holmdel, New Jersey, Los Angeles, Seattle and Toronto.  Sabbath will kick off the outing July 25th in Houston, Texas.  New stops include Philadelphia, Boston, Chicago and San Francisco. 

Fans can RSVP for May 2nd presale tickets through Live Nation on Facebook.  Tickets for the general public will go on sale next Saturday, May 4th.  Black Sabbath launched their world tour April 20th with two shows in Auckland, New Zealand. 

The lineup includes Ozzy Osbourne, Tony Iommi and Geezer Butler.  The band is previewing music from their upcoming album, titled, "13," due out June 11th.  

Here are the dates for Black Sabbath's North American tour: 

DATE                                     CITY                                       VENUE 
+Thu- Jul 25                        Houston, TX                       Cynthia Woods Mitchell Pavilion 
+Sat-Jul 27                          Austin, TX                            Frank Erwin Center 
+Wed-Jul 31                       W. Palm Beach, FL           Cruzan Amphitheatre 
~Fri-Aug 02                         Bristow, VA                        Jiffy Lube Live 
*Sun-Aug 04                      Holmdel, NJ                        PNC Bank Arts Center 
+Tue-Aug 06                      Detroit, MI                          DTE Energy Music Theatre 
+Thu-Aug 08                      Uncasville, CT                    Mohegan Sun Arena 
+Sat-Aug 10                        Philadelphia, PA               Wells Fargo Center 
^Mon-Aug 12                    Boston, MA                        Comcast Center 
*Wed-Aug 14                    Toronto, ON                       Air Canada Centre 
+Fri Aug 16                          Tinley Park, IL                    First Midwest Bank Amphitheatre 
+Sun-Aug 18                      Indianapolis, IN                 Klipsch Music Center 
+Thu-Aug 22                      Vancouver, BC                  Rogers Arena 
*Sat-Aug 24                        Seattle, WA                        Gorge Amphitheatre 
+Mon-Aug 26                    San Francisco, CA             Shoreline Amphitheatre at Mountain View 
+Wed-Aug 28                    Irvine, CA                            Verizon Wireless Amphitheatre 
+Fri-Aug 30                         Phoenix, AZ                        US Airways Center 
+Sun-Sep 01                       Las Vegas, NV                    MGM Grand Garden Arena 
*Tue-Sep 03                       Los Angeles, CA                                Los Angeles Sports Arena 

*Previously announced date. 
^On sale Friday, May 3 
+On sale Saturday, May 4 
~On sale, Friday May 10 

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