Radhika Merchant and Anant Ambani.Getty ImagesAnant Ambani and Radhika Merchant had a weekendlong prewedding party in March.The couple continue their festivities next week with a luxury cruise, the Deccan Chronicle reported.They'll reportedly be joined by about 800 guests on a cruise from Italy to the south of France.The Ambanis are continuing their glitzy prewedding celebrations with another set of festivities.