"Call Me Maybe" biggest cultural phenom since "...BOMT"?
We know the song is massive worldwide and the cultural impact has been hell impressive. We know also it's vying to become a classic, compared to other legendary anthems or big smashes:
We know it's bigger than We Found Love, Hollaback Girl, Poker Face, Tik Tok
I wouldn't go that far back, I think Single Ladies was the last big cultural phenomenon. I don't think the cultural impact is even close to that of BOMT or SL though.