The 'California Gurls' pair will reunite for the upcoming Doggystyle 2: The Doggumentary.By Jayson Rodriguez Katy Perry and Snoop Dogg Photo: Jeff Kravitz/ Getty Images Snoop Dogg is in a "let's do it again" type of mood. The rapper announced plans to work with Katy Perry again after the pair's "California Gurls" collaboration shot to the top of the iTunes singles chart this week.