Bieber has charged around $10 million (about 83 crore rupees) for his performance.
Past pre-wedding functions featured artists like Rihanna, Katy Perry, Pitbull, DJ David Guetta, Andrea Bocelli, and the Backstreet Boys.
International celebrities like Adele, Drake, and Lana Del Rey are also in talks to perform at the wedding.
Anant Ambani and Radhika Merchant's wedding is scheduled for July 12 at Jio World Center in Mumbai
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Radhika Merchant wore a pink lehenga, accessorized with a maang tikka, heavy diamond neckpiece, and earrings for the Mameru function