Review: Katy Perry, ‘Teenage Dream’: Aidin Vaziri | Get over the fact that she barely sounds human and Katy Perry’s second pop album is a pretty spectacular achievement. Not everyone can make Gwen Stefani sound like an earnest old rock ‘n’ roll guru. But even the No Doubt singer – the woman responsible for the lunacy that was “Hollaback Girl” – probably would have passed on a song that climaxes with the kicker, “I wanna see your peacock/ Cock!/ Cock!/ Cock!” “Teenage Dream” knows no such boundaries. Perry’s tongue is clearly tucked deep into her cheek throughout. It’s just that, with all the bedazzled beats and intentionally synthetic sounds, it’s kind of hard to distinguish revelry from reality. The title track is a grinding celebration of putting out; the ubiquitous first single, “California Gurls,” fetishizes slut fashion; and “Last Friday Night (T.G.I.F.)” is basically a barrage of Monday morning Facebook status updates set to an electro melody. Incredibly, Perry has managed to dumb things down since her previous release, the 5 million-selling “One of the Boys,” which contained “Ur So Gay.” That can mean only one thing: This one will sell twice as much.