Cameron Dallas: Don't Cry For Me, Milan!

Vine star Cameron Dallas got a taste of Beatlemania ... or like the King of Pop or Evita Peron ... when an insane mob of fans showed up outside the Calvin Klein runway show.

CK flew Cam to Milan for Fashion Week -- that's the kind of power you get with 2 billion loops on Vine.

The crowd is insane ... even DJ Khaled doesn't even have this kind of pull (yet), but Cam handles it like a pro.