Nothing is ever a sure bet to be a #1 hit, but it seems like Mariah Carey's new single "Bye Bye," the second from her brand new album E=MC2, is about as close as it gets. Co-produced by Stargate and co-written by Johnta Austin, one of the writers behind the mega-smash "We Belong Together," the song has a universal lyrical appeal and the instant feel of a Mariah Carey classic.