Close to 100 shows into her Witness world tour, Katy Perry and her entourage have their stage spectacular down to a well-oiled machine.

From the moment she arrived on stage riding an airborne, metallic star, Perry owned the stage.

Singer Katy Perry performs during her opening show at Perth Arena in Perth. Credit:AAP Image/Tony McDonough

The show rode the line between sci-fi and 80’s style, along with a fair amount of sparkly, bubblegum-pink latex.

Sixteen-thousand people packed out Perth Arena for Perry’s first west coast show, everyone from pink-haired women in their 70s to an army of little girls in grrrrl power jumpers and pink, light-up cat-ear headbands.