The fifth official single from Katy Perry's Prism, "This Is How We Do," is the most laid back of the bunch, but then again it is a song about hanging out and partying. While there are better tracks on the album that deserve the single treatment (like "Walking on Air" and "International Smile"), late summer is a logical time to deliver "This Is How We Do." It's filled with great lyrical jokes (ie "sucking real bad at Mariah Carey-oke") and Perry sounds like she's having a good time performing the tune. In fact, it's one of the more subtle tracks in her catalog because its pop smarts are masked by a chilled out sound. Though it may not go full power-pop on the listener like Perry's other party tunes ("Last Friday Night," "I Kissed a Girl") I would be surprised if you aren't humming it after a listen or two.