Pop superstar Katy Perry has announced a series of brand-new U.S. dates on her California Dreams 2011 World Tour sponsored by Shick Quattro for Women ®. The new shows commence on September 7 following on the heels of the summer North American leg of the tour, which kicks off Stateside on June 7th in Atlanta and runs through August 14th with two shows in Katy’s Santa Barbara hometown. Katy just wrapped sold-out dates in the U.K. before heading to sold-out shows in Australia, New Zealand and Japan in May. North American dates feature a rotating group of exciting openers, including Robyn, Janelle Monáe, and Marina & The Diamonds. DJ Skeet Skeet performs on all dates.