Caution also hit number 1 on Itunes when it came out. It was a fight between that and Glitter, so I think the fans did well for Caution. As for E=MC2, I agree that Migrate should've been released. I remember they had the fans voting for the next single and the overwhelming response was I Stay In Love that's why it was released instead of Migrate. I love I Stay In Love but that was a try-hard copycat of We Belong Together and shouldn't have been released.