Review: Katy Perry @ Water Rats

'I want you to pop my cherry!' shouts Katy Perry, at this her first ever UK gig. Knowing exactly how to drive the teenagers packed into London's tiny Water Rats wild, she's even more wide-eyed and coy than she looks on TV – her vampish dress showing off, as one punter put it, 'a great rack'.

Her debut album isn't out yet, but this crowd know every word. Undoubtedly a show-woman, Katy's bright blue eyes flash round the room wildly as she spends every moment trying to shock whether it be burping into the mic, begging the audience to 'touch her boob', telling us about her sexual exploits or peppering her lyrics with swearing.

Ripping into boys is a major theme. 'If You Can Afford Me' tells them off for expecting too much in return for dinner, while the unashamedly cruel 'You're So Gay' disses her ex for being too metrosexual. Named as her 'sing-along anthem', her casual use of 'gay' as a derogatory term is reprehensible.

While the insincere rocky ballads show off her Alanis-esque voice, it's the poppy 'Hot N Cold' that we enjoyed the most. A song almost too good for Perry, it's a pulsating pop rock anthem that P!nk would kill for.

Katy disappears briefly off stage for a mock call to her super Christian mom. 'I just want to make one thing clear, she was really f**king hot!' she shouts, before launching into a rocked up version of bisexual shock-a-thon 'I Kissed A Girl' complete with head thrashing guitar breakdown.

Katy Perry, obsessed with bodily parts, sexuality and acting all alternative, is the perfect pin up for 15-year-olds who find emo too dark. It's calculated corporate quirk and as that alone, is very good at what it does.