Y'all know I never really knew that Crazy In love was that "big", to be honest I thought her other songs were more successful, maybe because I only started paying real attention to music in the end of 2003/2004.
But nevertheless, I see "Toxic" as a way legendary song and way better!
Crazy in Love is the better song for sure. I do love Toxic though, but CIL is probably the best song any popstar released in the 2000's. It's timeless. It's never going to sound dated.