Katy Perry launched her mini U.K. tour with the first of two sell-out shows at London's O2 Shepherds Bush Empire, as she continues the "One of the Boys" (Virgin) campaign.

The set has sold 389,000 copies in the U.K. according to the Official Charts Co, and EMI will be hoping to drive sales towards half a million with Perry's presence in Britain and the new single "Waking Up in Vegas," released on Monday (June 8).

Perry did make an appearance at the Capital FM Summertime Ball at soccer team Arsenal's Emirates Stadium at the weekend (June 7). But the U.K. tour proper began last night (June 9) with an 80-minute set at the 2,000 capacity London venue.

The show included all of her debut album and a cover of Queen's "Don't Stop Me Now," as well as the familiar giant inflatable strawberrys and cherry ChapStick. Perry's EMI Music boss, chief executive Elio Leoni-Sceti, was dancing on the balcony for the inevitable finale of "I Kissed a Girl."

The 'Hello Katy' tour is promoted by Live Nation in London (June 9 and 10) and at Brighton Dome (June 11). The other dates have been moved due to scheduling conflicts, with the Birmingham O2 Academy show now on Aug. 25 and the Newcastle O2 Academy show on Aug. 26; both dates are promoted by SJM. The Glasgow Barrowland show, co-promoted by PCL and DF Concerts, is on Aug. 21.