Katy Perry Live at UK’s HMV Hammersmith Apollo

Katy Perry and her sweet shop-inspired outfits hit London last night for the start of the UK leg of her California Dreams World Tour, and we've got tons of pictures of her in action.

No word if Perry's husband -- fellow globe-trotting celebrity Russell Brand -- was on hand as his new bride visited his home country, but we're sure the rest of his country folk will enjoy the sonic pop confections and visual extravaganza Katy's been cooking up for this tour, which hits the States later this year.