Ah! What the Hell is Max Martin. That makes sense. He's pretty on fire at the moment after a few years of terror (thanks for the worst Britney singles, Max. And also thanks for the best ones). Shellback is his right-hand man/ lapdog - though I think he was mostly responsible for the great songs on Ke$ha's Animal.
That's an odd personnel list though. I'm not impressed to see Whibley still floating about. I hold him solely responsible for the shit bits in this
. Clearly an Avril chorus though.