OMG!!! Roar ing and pouring it up at the same time seems wayyyy too good to be true, but it's totez happening! YUP! Rihanna and Katy Perry are collaborating! Cotton candy twerking dreams really do come true! Katy confirmed: "We’ve actually been talking about it for years, so we can’t let anyone down.We have to do the best song ever. Beyond that, I think we’ll definitely get around to it and when it happens, you are going to know.” That could mean the song will debut any time in the next decade.