The Pre-Wedding Singers: Justin Bieber, Rihanna

Here are three signs that you’re a global superstar: (1) You have more than 100 million Instagram followers; (2) your concerts sell out in seconds; and (3) you’ve performed at an Ambani wedding.

The Ambanis are Asia’s richest family, worth more than $122 billion. To put that in perspective, Mukesh and Nita Ambani are wealthy enough to buy a copy of “Craz…