5. Kim Kardashian and Kanye West
With her previous wedding costing around $10 million already being one of the most expensive weddings of all time, trust Kim Kardashian to top her own achievements. Her wedding to Kanye West in May 2014 took place in Palace of Versailles, France, and the bride walked down the aisle in her stunning custom Givenchy gown. The celebrations lasted for a whole weekend, and included a lavish pre-wedding dinner, a guided tour of the grounds of Versailles and a reception at the Chateau de Wideville. The bill came out to be around $20 million.